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diff --git a/python/psutil/HISTORY.rst b/python/psutil/HISTORY.rst
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+Bug tracker at https://github.com/giampaolo/psutil/issues
+
+3.1.1 - 2015-07-15
+==================
+
+**Bug fixes**
+
+- #645: [Linux] psutil.cpu_times_percent() may produce negative results.
+- #656: 'from psutil import *' does not work.
+
+
+3.1.0 - 2015-07-15
+==================
+
+**Enhancements**
+
+- #534: [Linux] disk_partitions() added support for ZFS filesystems.
+- #646: continuous tests integration for Windows with
+  https://ci.appveyor.com/project/giampaolo/psutil.
+- #647: new dev guide:
+  https://github.com/giampaolo/psutil/blob/master/DEVGUIDE.rst
+- #651: continuous code quality test integration with
+  https://scrutinizer-ci.com/g/giampaolo/psutil/
+
+**Bug fixes**
+
+- #340: [Windows] Process.open_files() no longer hangs. Instead it uses a
+  thred which times out and skips the file handle in case it's taking too long
+  to be retrieved.  (patch by Jeff Tang, PR #597)
+- #627: [Windows] Process.name() no longer raises AccessDenied for pids owned
+  by another user.
+- #636: [Windows] Process.memory_info() raise AccessDenied.
+- #637: [UNIX] raise exception if trying to send signal to Process PID 0 as it
+  will affect os.getpid()'s process group instead of PID 0.
+- #639: [Linux] Process.cmdline() can be truncated.
+- #640: [Linux] *connections functions may swallow errors and return an
+  incomplete list of connnections.
+- #642: repr() of exceptions is incorrect.
+- #653: [Windows] Add inet_ntop function for Windows XP to support IPv6.
+- #641: [Windows] Replace deprecated string functions with safe equivalents.
+
+
+3.0.1 - 2015-06-18
+==================
+
+**Bug fixes**
+
+- #632: [Linux] better error message if cannot parse process UNIX connections.
+- #634: [Linux] Proces.cmdline() does not include empty string arguments.
+- #635: [UNIX] crash on module import if 'enum' package is installed on python
+  < 3.4.
+
+
+3.0.0 - 2015-06-13
+==================
+
+**Enhancements**
+
+- #250: new psutil.net_if_stats() returning NIC statistics (isup, duplex,
+  speed, MTU).
+- #376: new psutil.net_if_addrs() returning all NIC addresses a-la ifconfig.
+- #469: on Python >= 3.4 ``IOPRIO_CLASS_*`` and ``*_PRIORITY_CLASS`` constants
+  returned by psutil.Process' ionice() and nice() methods are enums instead of
+  plain integers.
+- #581: add .gitignore. (patch by Gabi Davar)
+- #582: connection constants returned by psutil.net_connections() and
+  psutil.Process.connections() were turned from int to enums on Python > 3.4.
+- #587: Move native extension into the package.
+- #589: Process.cpu_affinity() accepts any kind of iterable (set, tuple, ...),
+  not only lists.
+- #594: all deprecated APIs were removed.
+- #599: [Windows] process name() can now be determined for all processes even
+  when running as a limited user.
+- #602: pre-commit GIT hook.
+- #629: enhanced support for py.test and nose test discovery and tests run.
+- #616: [Windows] Add inet_ntop function for Windows XP.
+
+**Bug fixes**
+
+- #428: [all UNIXes except Linux] correct handling of zombie processes;
+  introduced new ZombieProcess exception class.
+- #512: [BSD] fix segfault in net_connections().
+- #555: [Linux] psutil.users() correctly handles ":0" as an alias for
+  "localhost"
+- #579: [Windows] Fixed open_files() for PID>64K.
+- #579: [Windows] fixed many compiler warnings.
+- #585: [FreeBSD] net_connections() may raise KeyError.
+- #586: [FreeBSD] cpu_affinity() segfaults on set in case an invalid CPU
+  number is provided.
+- #593: [FreeBSD] Process().memory_maps() segfaults.
+- #606: Process.parent() may swallow NoSuchProcess exceptions.
+- #611: [SunOS] net_io_counters has send and received swapped
+- #614: [Linux]: cpu_count(logical=False) return the number of physical CPUs
+  instead of physical cores.
+- #618: [SunOS] swap tests fail on Solaris when run as normal user
+- #628: [Linux] Process.name() truncates process name in case it contains
+  spaces or parentheses.
+
+
+2.2.1 - 2015-02-02
+==================
+
+**Bug fixes**
+
+- #496: [Linux] fix "ValueError: ambiguos inode with multiple PIDs references"
+  (patch by Bruno Binet)
+
+
+2.2.0 - 2015-01-06
+==================
+
+**Enhancements**
+
+- #521: drop support for Python 2.4 and 2.5.
+- #553: new examples/pstree.py script.
+- #564: C extension version mismatch in case the user messed up with psutil
+  installation or with sys.path is now detected at import time.
+- #568: New examples/pidof.py script.
+- #569: [FreeBSD] add support for process CPU affinity.
+
+**Bug fixes**
+
+- #496: [Solaris] can't import psutil.
+- #547: [UNIX] Process.username() may raise KeyError if UID can't be resolved.
+- #551: [Windows] get rid of the unicode hack for net_io_counters() NIC names.
+- #556: [Linux] lots of file handles were left open.
+- #561: [Linux] net_connections() might skip some legitimate UNIX sockets.
+  (patch by spacewander)
+- #565: [Windows] use proper encoding for psutil.Process.username() and
+  psutil.users(). (patch by Sylvain Mouquet)
+- #567: [Linux] in the alternative implementation of CPU affinity PyList_Append
+  and Py_BuildValue return values are not checked.
+- #569: [FreeBSD] fix memory leak in psutil.cpu_count(logical=False).
+- #571: [Linux] Process.open_files() might swallow AccessDenied exceptions and
+  return an incomplete list of open files.
+
+
+2.1.3 - 2014-09-26
+==================
+
+- #536: [Linux]: fix "undefined symbol: CPU_ALLOC" compilation error.
+
+
+2.1.2 - 2014-09-21
+==================
+
+**Enhancements**
+
+- #407: project moved from Google Code to Github; code moved from Mercurial
+  to Git.
+- #492: use tox to run tests on multiple python versions.  (patch by msabramo)
+- #505: [Windows] distribution as wheel packages.
+- #511: new examples/ps.py sample code.
+
+**Bug fixes**
+
+- #340: [Windows] Process.get_open_files() no longer hangs.  (patch by
+  Jeff Tang)
+- #501: [Windows] disk_io_counters() may return negative values.
+- #503: [Linux] in rare conditions Process exe(), open_files() and
+  connections() methods can raise OSError(ESRCH) instead of NoSuchProcess.
+- #504: [Linux] can't build RPM packages via setup.py
+- #506: [Linux] python 2.4 support was broken.
+- #522: [Linux] Process.cpu_affinity() might return EINVAL.  (patch by David
+  Daeschler)
+- #529: [Windows] Process.exe() may raise unhandled WindowsError exception
+  for PIDs 0 and 4.  (patch by Jeff Tang)
+- #530: [Linux] psutil.disk_io_counters() may crash on old Linux distros
+  (< 2.6.5)  (patch by Yaolong Huang)
+- #533: [Linux] Process.memory_maps() may raise TypeError on old Linux distros.
+
+
+2.1.1 - 2014-04-30
+==================
+
+**Bug fixes**
+
+- #446: [Windows] fix encoding error when using net_io_counters() on Python 3.
+  (patch by Szigeti Gabor Niif)
+- #460: [Windows] net_io_counters() wraps after 4G.
+- #491: [Linux] psutil.net_connections() exceptions. (patch by Alexander Grothe)
+
+
+2.1.0 - 2014-04-08
+==================
+
+**Enhancements**
+
+- #387: system-wide open connections a-la netstat.
+
+**Bug fixes**
+
+- #421: [Solaris] psutil does not compile on SunOS 5.10 (patch by Naveed
+  Roudsari)
+- #489: [Linux] psutil.disk_partitions() return an empty list.
+
+
+2.0.0 - 2014-03-10
+==================
+
+**Enhancements**
+
+- #424: [Windows] installer for Python 3.X 64 bit.
+- #427: number of logical and physical CPUs (psutil.cpu_count()).
+- #447: psutil.wait_procs() timeout parameter is now optional.
+- #452: make Process instances hashable and usable with set()s.
+- #453: tests on Python < 2.7 require unittest2 module.
+- #459: add a make file for running tests and other repetitive tasks (also
+  on Windows).
+- #463: make timeout parameter of cpu_percent* functions default to 0.0 'cause
+  it's a common trap to introduce slowdowns.
+- #468: move documentation to readthedocs.com.
+- #477: process cpu_percent() is about 30% faster.  (suggested by crusaderky)
+- #478: [Linux] almost all APIs are about 30% faster on Python 3.X.
+- #479: long deprecated psutil.error module is gone; exception classes now
+  live in "psutil" namespace only.
+
+**Bug fixes**
+
+- #193: psutil.Popen constructor can throw an exception if the spawned process
+  terminates quickly.
+- #340: [Windows] process get_open_files() no longer hangs.  (patch by
+  jtang@vahna.net)
+- #443: [Linux] fix a potential overflow issue for Process.set_cpu_affinity()
+  on systems with more than 64 CPUs.
+- #448: [Windows] get_children() and ppid() memory leak (patch by Ulrich
+  Klank).
+- #457: [POSIX] pid_exists() always returns True for PID 0.
+- #461: namedtuples are not pickle-able.
+- #466: [Linux] process exe improper null bytes handling.  (patch by
+  Gautam Singh)
+- #470: wait_procs() might not wait.  (patch by crusaderky)
+- #471: [Windows] process exe improper unicode handling. (patch by
+  alex@mroja.net)
+- #473: psutil.Popen.wait() does not set returncode attribute.
+- #474: [Windows] Process.cpu_percent() is no longer capped at 100%.
+- #476: [Linux] encoding error for process name and cmdline.
+
+**API changes**
+
+For the sake of consistency a lot of psutil APIs have been renamed.
+In most cases accessing the old names will work but it will cause a
+DeprecationWarning.
+
+- psutil.* module level constants have being replaced by functions:
+
+  +-----------------------+-------------------------------+
+  | Old name              | Replacement                   |
+  +=======================+===============================+
+  | psutil.NUM_CPUS       | psutil.cpu_cpunt()            |
+  +-----------------------+-------------------------------+
+  | psutil.BOOT_TIME      | psutil.boot_time()            |
+  +-----------------------+-------------------------------+
+  | psutil.TOTAL_PHYMEM   | psutil.virtual_memory().total |
+  +-----------------------+-------------------------------+
+
+- Renamed psutil.* functions:
+
+  +--------------------------+-------------------------------+
+  | Old name                 | Replacement                   |
+  +==========================+===============================+
+  | - psutil.get_pid_list()  | psutil.pids()                 |
+  +--------------------------+-------------------------------+
+  | - psutil.get_users()     | psutil.users()                |
+  +--------------------------+-------------------------------+
+  | - psutil.get_boot_time() | psutil.boot_time()            |
+  +--------------------------+-------------------------------+
+
+- All psutil.Process ``get_*`` methods lost the ``get_`` prefix.
+  get_ext_memory_info() renamed to memory_info_ex().
+  Assuming "p = psutil.Process()":
+
+  +--------------------------+----------------------+
+  | Old name                 | Replacement          |
+  +==========================+======================+
+  | p.get_children()         | p.children()         |
+  +--------------------------+----------------------+
+  | p.get_connections()      | p.connections()      |
+  +--------------------------+----------------------+
+  | p.get_cpu_affinity()     | p.cpu_affinity()     |
+  +--------------------------+----------------------+
+  | p.get_cpu_percent()      | p.cpu_percent()      |
+  +--------------------------+----------------------+
+  | p.get_cpu_times()        | p.cpu_times()        |
+  +--------------------------+----------------------+
+  | p.get_ext_memory_info()  | p.memory_info_ex()   |
+  +--------------------------+----------------------+
+  | p.get_io_counters()      | p.io_counters()      |
+  +--------------------------+----------------------+
+  | p.get_ionice()           | p.ionice()           |
+  +--------------------------+----------------------+
+  | p.get_memory_info()      | p.memory_info()      |
+  +--------------------------+----------------------+
+  | p.get_memory_maps()      | p.memory_maps()      |
+  +--------------------------+----------------------+
+  | p.get_memory_percent()   | p.memory_percent()   |
+  +--------------------------+----------------------+
+  | p.get_nice()             | p.nice()             |
+  +--------------------------+----------------------+
+  | p.get_num_ctx_switches() | p.num_ctx_switches() |
+  +--------------------------+----------------------+
+  | p.get_num_fds()          | p.num_fds()          |
+  +--------------------------+----------------------+
+  | p.get_num_threads()      | p.num_threads()      |
+  +--------------------------+----------------------+
+  | p.get_open_files()       | p.open_files()       |
+  +--------------------------+----------------------+
+  | p.get_rlimit()           | p.rlimit()           |
+  +--------------------------+----------------------+
+  | p.get_threads()          | p.threads()          |
+  +--------------------------+----------------------+
+  | p.getcwd()               | p.cwd()              |
+  +--------------------------+----------------------+
+
+- All psutil.Process ``set_*`` methods lost the ``set_`` prefix.
+  Assuming "p = psutil.Process()":
+
+  +----------------------+---------------------------------+
+  | Old name             | Replacement                     |
+  +======================+=================================+
+  | p.set_nice()         | p.nice(value)                   |
+  +----------------------+---------------------------------+
+  | p.set_ionice()       | p.ionice(ioclass, value=None)   |
+  +----------------------+---------------------------------+
+  | p.set_cpu_affinity() | p.cpu_affinity(cpus)            |
+  +----------------------+---------------------------------+
+  | p.set_rlimit()       | p.rlimit(resource, limits=None) |
+  +----------------------+---------------------------------+
+
+- Except for 'pid' all psutil.Process class properties have been turned into
+  methods. This is the only case which there are no aliases.
+  Assuming "p = psutil.Process()":
+
+  +---------------+-----------------+
+  | Old name      | Replacement     |
+  +===============+=================+
+  | p.name        | p.name()        |
+  +---------------+-----------------+
+  | p.parent      | p.parent()      |
+  +---------------+-----------------+
+  | p.ppid        | p.ppid()        |
+  +---------------+-----------------+
+  | p.exe         | p.exe()         |
+  +---------------+-----------------+
+  | p.cmdline     | p.cmdline()     |
+  +---------------+-----------------+
+  | p.status      | p.status()      |
+  +---------------+-----------------+
+  | p.uids        | p.uids()        |
+  +---------------+-----------------+
+  | p.gids        | p.gids()        |
+  +---------------+-----------------+
+  | p.username    | p.username()    |
+  +---------------+-----------------+
+  | p.create_time | p.create_time() |
+  +---------------+-----------------+
+
+- timeout parameter of cpu_percent* functions defaults to 0.0 instead of 0.1.
+- long deprecated psutil.error module is gone; exception classes now live in
+  "psutil" namespace only.
+- Process instances' "retcode" attribute returned by psutil.wait_procs() has
+  been renamed to "returncode" for consistency with subprocess.Popen.
+
+
+1.2.1 - 2013-11-25
+==================
+
+**Bug fixes**
+
+- #348: [Windows XP] fixed "ImportError: DLL load failed" occurring on module
+  import.
+- #425: [Solaris] crash on import due to failure at determining BOOT_TIME.
+- #443: [Linux] can't set CPU affinity on systems with more than 64 cores.
+
+
+1.2.0 - 2013-11-20
+==================
+
+**Enhancements**
+
+- #439: assume os.getpid() if no argument is passed to psutil.Process
+  constructor.
+- #440: new psutil.wait_procs() utility function which waits for multiple
+  processes to terminate.
+
+**Bug fixes**
+
+- #348: [Windows XP/Vista] fix "ImportError: DLL load failed" occurring on
+  module import.
+
+
+1.1.3 - 2013-11-07
+==================
+
+**Bug fixes**
+
+- #442: [Linux] psutil won't compile on certain version of Linux because of
+  missing prlimit(2) syscall.
+
+
+1.1.2 - 2013-10-22
+==================
+
+**Bug fixes**
+
+- #442: [Linux] psutil won't compile on Debian 6.0 because of missing
+  prlimit(2) syscall.
+
+
+1.1.1 - 2013-10-08
+==================
+
+**Bug fixes**
+
+- #442: [Linux] psutil won't compile on kernels < 2.6.36 due to missing
+  prlimit(2) syscall.
+
+
+1.1.0 - 2013-09-28
+==================
+
+**Enhancements**
+
+- #410: host tar.gz and windows binary files are on PYPI.
+- #412: [Linux] get/set process resource limits.
+- #415: [Windows] Process.get_children() is an order of magnitude faster.
+- #426: [Windows] Process.name is an order of magnitude faster.
+- #431: [UNIX] Process.name is slightly faster because it unnecessarily
+  retrieved also process cmdline.
+
+**Bug fixes**
+
+- #391: [Windows] psutil.cpu_times_percent() returns negative percentages.
+- #408: STATUS_* and CONN_* constants don't properly serialize on JSON.
+- #411: [Windows] examples/disk_usage.py may pop-up a GUI error.
+- #413: [Windows] Process.get_memory_info() leaks memory.
+- #414: [Windows] Process.exe on Windows XP may raise ERROR_INVALID_PARAMETER.
+- #416: psutil.disk_usage() doesn't work well with unicode path names.
+- #430: [Linux] process IO counters report wrong number of r/w syscalls.
+- #435: [Linux] psutil.net_io_counters() might report erreneous NIC names.
+- #436: [Linux] psutil.net_io_counters() reports a wrong 'dropin' value.
+
+**API changes**
+
+- #408: turn STATUS_* and CONN_* constants into plain Python strings.
+
+
+1.0.1 - 2013-07-12
+==================
+
+**Bug fixes**
+
+- #405: network_io_counters(pernic=True) no longer works as intended in 1.0.0.
+
+
+1.0.0 - 2013-07-10
+==================
+
+**Enhancements**
+
+- #18:  Solaris support (yay!)  (thanks Justin Venus)
+- #367: Process.get_connections() 'status' strings are now constants.
+- #380: test suite exits with non-zero on failure.  (patch by floppymaster)
+- #391: introduce unittest2 facilities and provide workarounds if unittest2
+  is not installed (python < 2.7).
+
+**Bug fixes**
+
+- #374: [Windows] negative memory usage reported if process uses a lot of
+  memory.
+- #379: [Linux] Process.get_memory_maps() may raise ValueError.
+- #394: [OSX] Mapped memory regions report incorrect file name.
+- #404: [Linux] sched_*affinity() are implicitly declared. (patch by Arfrever)
+
+**API changes**
+
+- Process.get_connections() 'status' field is no longer a string but a
+  constant object (psutil.CONN_*).
+- Process.get_connections() 'local_address' and 'remote_address' fields
+  renamed to 'laddr' and 'raddr'.
+- psutil.network_io_counters() renamed to psutil.net_io_counters().
+
+
+0.7.1 - 2013-05-03
+==================
+
+**Bug fixes**
+
+- #325: [BSD] psutil.virtual_memory() can raise SystemError.
+  (patch by Jan Beich)
+- #370: [BSD] Process.get_connections() requires root.  (patch by John Baldwin)
+- #372: [BSD] different process methods raise NoSuchProcess instead of
+  AccessDenied.
+
+
+0.7.0 - 2013-04-12
+==================
+
+**Enhancements**
+
+- #233: code migrated to Mercurial (yay!)
+- #246: psutil.error module is deprecated and scheduled for removal.
+- #328: [Windows] process IO nice/priority support.
+- #359: psutil.get_boot_time()
+- #361: [Linux] psutil.cpu_times() now includes new 'steal', 'guest' and
+  'guest_nice' fields available on recent Linux kernels.
+  Also, psutil.cpu_percent() is more accurate.
+- #362: cpu_times_percent() (per-CPU-time utilization as a percentage)
+
+**Bug fixes**
+
+- #234: [Windows] disk_io_counters() fails to list certain disks.
+- #264: [Windows] use of psutil.disk_partitions() may cause a message box to
+  appear.
+- #313: [Linux] psutil.virtual_memory() and psutil.swap_memory() can crash on
+  certain exotic Linux flavors having an incomplete /proc interface.
+  If that's the case we now set the unretrievable stats to 0 and raise a
+  RuntimeWarning.
+- #315: [OSX] fix some compilation warnings.
+- #317: [Windows] cannot set process CPU affinity above 31 cores.
+- #319: [Linux] process get_memory_maps() raises KeyError 'Anonymous' on Debian
+  squeeze.
+- #321: [UNIX] Process.ppid property is no longer cached as the kernel may set
+  the ppid to 1 in case of a zombie process.
+- #323: [OSX] disk_io_counters()'s read_time and write_time parameters were
+  reporting microseconds not milliseconds.  (patch by Gregory Szorc)
+- #331: Process cmdline is no longer cached after first acces as it may change.
+- #333: [OSX] Leak of Mach ports on OS X (patch by rsesek@google.com)
+- #337: [Linux] process methods not working because of a poor /proc
+  implementation will raise NotImplementedError rather than RuntimeError
+  and Process.as_dict() will not blow up.  (patch by Curtin1060)
+- #338: [Linux] disk_io_counters() fails to find some disks.
+- #339: [FreeBSD] get_pid_list() can allocate all the memory on system.
+- #341: [Linux] psutil might crash on import due to error in retrieving system
+  terminals map.
+- #344: [FreeBSD] swap_memory() might return incorrect results due to
+  kvm_open(3) not being called. (patch by Jean Sebastien)
+- #338: [Linux] disk_io_counters() fails to find some disks.
+- #351: [Windows] if psutil is compiled with mingw32 (provided installers for
+  py2.4 and py2.5 are) disk_io_counters() will fail. (Patch by m.malycha)
+- #353: [OSX] get_users() returns an empty list on OSX 10.8.
+- #356: Process.parent now checks whether parent PID has been reused in which
+  case returns None.
+- #365: Process.set_nice() should check PID has not been reused by another
+  process.
+- #366: [FreeBSD] get_memory_maps(), get_num_fds(), get_open_files() and
+  getcwd() Process methods raise RuntimeError instead of AccessDenied.
+
+**API changes**
+
+- Process.cmdline property is no longer cached after first access.
+- Process.ppid property is no longer cached after first access.
+- [Linux] Process methods not working because of a poor /proc implementation
+  will raise NotImplementedError instead of RuntimeError.
+- psutil.error module is deprecated and scheduled for removal.
+
+
+0.6.1 - 2012-08-16
+==================
+
+**Enhancements**
+
+- #316: process cmdline property now makes a better job at guessing the process
+  executable from the cmdline.
+
+**Bug fixes**
+
+- #316: process exe was resolved in case it was a symlink.
+- #318: python 2.4 compatibility was broken.
+
+**API changes**
+
+- process exe can now return an empty string instead of raising AccessDenied.
+- process exe is no longer resolved in case it's a symlink.
+
+
+0.6.0 - 2012-08-13
+==================
+
+**Enhancements**
+
+- #216: [POSIX] get_connections() UNIX sockets support.
+- #220: [FreeBSD] get_connections() has been rewritten in C and no longer
+  requires lsof.
+- #222: [OSX] add support for process cwd.
+- #261: process extended memory info.
+- #295: [OSX] process executable path is now determined by asking the OS
+  instead of being guessed from process cmdline.
+- #297: [OSX] the Process methods below were always raising AccessDenied for
+  any process except the current one. Now this is no longer true. Also
+  they are 2.5x faster.
+  - name
+  - get_memory_info()
+  - get_memory_percent()
+  - get_cpu_times()
+  - get_cpu_percent()
+  - get_num_threads()
+- #300: examples/pmap.py script.
+- #301: process_iter() now yields processes sorted by their PIDs.
+- #302: process number of voluntary and involuntary context switches.
+- #303: [Windows] the Process methods below were always raising AccessDenied
+  for any process not owned by current user. Now this is no longer true:
+  - create_time
+  - get_cpu_times()
+  - get_cpu_percent()
+  - get_memory_info()
+  - get_memory_percent()
+  - get_num_handles()
+  - get_io_counters()
+- #305: add examples/netstat.py script.
+- #311: system memory functions has been refactorized and rewritten and now
+  provide a more detailed and consistent representation of the system
+  memory. New psutil.virtual_memory() function provides the following
+  memory amounts:
+  - total
+  - available
+  - percent
+  - used
+  - active [POSIX]
+  - inactive [POSIX]
+  - buffers (BSD, Linux)
+  - cached (BSD, OSX)
+  - wired (OSX, BSD)
+  - shared [FreeBSD]
+  New psutil.swap_memory() provides:
+  - total
+  - used
+  - free
+  - percent
+  - sin (no. of bytes the system has swapped in from disk (cumulative))
+  - sout (no. of bytes the system has swapped out from disk (cumulative))
+  All old memory-related functions are deprecated.
+  Also two new example scripts were added:  free.py and meminfo.py.
+- #312: psutil.network_io_counters() namedtuple includes 4 new fields:
+  errin, errout dropin and dropout, reflecting the number of packets
+  dropped and with errors.
+
+**Bugfixes**
+
+- #298: [OSX and BSD] memory leak in get_num_fds().
+- #299: potential memory leak every time PyList_New(0) is used.
+- #303: [Windows] potential heap corruption in get_num_threads() and
+  get_status() Process methods.
+- #305: [FreeBSD] psutil can't compile on FreeBSD 9 due to removal of utmp.h.
+- #306: at C level, errors are not checked when invoking Py* functions which
+  create or manipulate Python objects leading to potential memory related
+  errors and/or segmentation faults.
+- #307: [FreeBSD] values returned by psutil.network_io_counters() are wrong.
+- #308: [BSD / Windows] psutil.virtmem_usage() wasn't actually returning
+  information about swap memory usage as it was supposed to do. It does
+  now.
+- #309: get_open_files() might not return files which can not be accessed
+  due to limited permissions. AccessDenied is now raised instead.
+
+**API changes**
+
+- psutil.phymem_usage() is deprecated       (use psutil.virtual_memory())
+- psutil.virtmem_usage() is deprecated      (use psutil.swap_memory())
+- psutil.phymem_buffers() on Linux is deprecated  (use psutil.virtual_memory())
+- psutil.cached_phymem() on Linux is deprecated   (use psutil.virtual_memory())
+- [Windows and BSD] psutil.virtmem_usage() now returns information about swap
+  memory instead of virtual memory.
+
+
+0.5.1 - 2012-06-29
+==================
+
+**Enhancements**
+
+- #293: [Windows] process executable path is now determined by asking the OS
+  instead of being guessed from process cmdline.
+
+**Bugfixes**
+
+- #292: [Linux] race condition in process files/threads/connections.
+- #294: [Windows] Process CPU affinity is only able to set CPU #0.
+
+
+0.5.0 - 2012-06-27
+==================
+
+**Enhancements**
+
+- #195: [Windows] number of handles opened by process.
+- #209: psutil.disk_partitions() now provides also mount options.
+- #229: list users currently connected on the system (psutil.get_users()).
+- #238: [Linux, Windows] process CPU affinity (get and set).
+- #242: Process.get_children(recursive=True): return all process
+  descendants.
+- #245: [POSIX] Process.wait() incrementally consumes less CPU cycles.
+- #257: [Windows] removed Windows 2000 support.
+- #258: [Linux] Process.get_memory_info() is now 0.5x faster.
+- #260: process's mapped memory regions. (Windows patch by wj32.64, OSX patch
+  by Jeremy Whitlock)
+- #262: [Windows] psutil.disk_partitions() was slow due to inspecting the
+  floppy disk drive also when "all" argument was False.
+- #273: psutil.get_process_list() is deprecated.
+- #274: psutil no longer requires 2to3 at installation time in order to work
+  with Python 3.
+- #278: new Process.as_dict() method.
+- #281: ppid, name, exe, cmdline and create_time properties of Process class
+  are now cached after being accessed.
+- #282: psutil.STATUS_* constants can now be compared by using their string
+  representation.
+- #283: speedup Process.is_running() by caching its return value in case the
+  process is terminated.
+- #284: [POSIX] per-process number of opened file descriptors.
+- #287: psutil.process_iter() now caches Process instances between calls.
+- #290: Process.nice property is deprecated in favor of new get_nice() and
+  set_nice() methods.
+
+**Bugfixes**
+
+- #193: psutil.Popen constructor can throw an exception if the spawned process
+  terminates quickly.
+- #240: [OSX] incorrect use of free() for Process.get_connections().
+- #244: [POSIX] Process.wait() can hog CPU resources if called against a
+  process which is not our children.
+- #248: [Linux] psutil.network_io_counters() might return erroneous NIC names.
+- #252: [Windows] process getcwd() erroneously raise NoSuchProcess for
+  processes owned by another user.  It now raises AccessDenied instead.
+- #266: [Windows] psutil.get_pid_list() only shows 1024 processes.
+  (patch by Amoser)
+- #267: [OSX] Process.get_connections() - an erroneous remote address was
+  returned. (Patch by Amoser)
+- #272: [Linux] Porcess.get_open_files() - potential race condition can lead to
+  unexpected NoSuchProcess exception.  Also, we can get incorrect reports
+  of not absolutized path names.
+- #275: [Linux] Process.get_io_counters() erroneously raise NoSuchProcess on
+  old Linux versions. Where not available it now raises
+  NotImplementedError.
+- #286: Process.is_running() doesn't actually check whether PID has been
+  reused.
+- #314: Process.get_children() can sometimes return non-children.
+
+**API changes**
+
+- Process.nice property is deprecated in favor of new get_nice() and set_nice()
+  methods.
+- psutil.get_process_list() is deprecated.
+- ppid, name, exe, cmdline and create_time properties of Process class are now
+  cached after being accessed, meaning NoSuchProcess will no longer be raised
+  in case the process is gone in the meantime.
+- psutil.STATUS_* constants can now be compared by using their string
+  representation.
+
+
+0.4.1 - 2011-12-14
+==================
+
+**Bugfixes**
+
+- #228: some example scripts were not working with python 3.
+- #230: [Windows / OSX] memory leak in Process.get_connections().
+- #232: [Linux] psutil.phymem_usage() can report erroneous values which are
+  different than "free" command.
+- #236: [Windows] memory/handle leak in Process's get_memory_info(),
+  suspend() and resume() methods.
+
+
+0.4.0 - 2011-10-29
+==================
+
+**Enhancements**
+
+- #150: network I/O counters. (OSX and Windows patch by Jeremy Whitlock)
+- #154: [FreeBSD] add support for process getcwd()
+- #157: [Windows] provide installer for Python 3.2 64-bit.
+- #198: Process.wait(timeout=0) can now be used to make wait() return
+  immediately.
+- #206: disk I/O counters. (OSX and Windows patch by Jeremy Whitlock)
+- #213: examples/iotop.py script.
+- #217: Process.get_connections() now has a "kind" argument to filter
+  for connections with different criteria.
+- #221: [FreeBSD] Process.get_open_files has been rewritten in C and no longer
+  relies on lsof.
+- #223: examples/top.py script.
+- #227: examples/nettop.py script.
+
+**Bugfixes**
+
+- #135: [OSX] psutil cannot create Process object.
+- #144: [Linux] no longer support 0 special PID.
+- #188: [Linux] psutil import error on Linux ARM architectures.
+- #194: [POSIX] psutil.Process.get_cpu_percent() now reports a percentage over
+  100 on multicore processors.
+- #197: [Linux] Process.get_connections() is broken on platforms not
+  supporting IPv6.
+- #200: [Linux] psutil.NUM_CPUS not working on armel and sparc architectures
+  and causing crash on module import.
+- #201: [Linux] Process.get_connections() is broken on big-endian
+  architectures.
+- #211: Process instance can unexpectedly raise NoSuchProcess if tested for
+  equality with another object.
+- #218: [Linux] crash at import time on Debian 64-bit because of a missing
+  line in /proc/meminfo.
+- #226: [FreeBSD] crash at import time on FreeBSD 7 and minor.
+
+
+0.3.0 - 2011-07-08
+==================
+
+**Enhancements**
+
+- #125: system per-cpu percentage utilization and times.
+- #163: per-process associated terminal (TTY).
+- #171: added get_phymem() and get_virtmem() functions returning system
+  memory information (total, used, free) and memory percent usage.
+  total_* avail_* and used_* memory functions are deprecated.
+- #172: disk usage statistics.
+- #174: mounted disk partitions.
+- #179: setuptools is now used in setup.py
+
+**Bugfixes**
+
+- #159: SetSeDebug() does not close handles or unset impersonation on return.
+- #164: [Windows] wait function raises a TimeoutException when a process
+  returns -1 .
+- #165: process.status raises an unhandled exception.
+- #166: get_memory_info() leaks handles hogging system resources.
+- #168: psutil.cpu_percent() returns erroneous results when used in
+  non-blocking mode.  (patch by Philip Roberts)
+- #178: OSX - Process.get_threads() leaks memory
+- #180: [Windows] Process's get_num_threads() and get_threads() methods can
+  raise NoSuchProcess exception while process still exists.
+
+
+0.2.1 - 2011-03-20
+==================
+
+**Enhancements**
+
+- #64: per-process I/O counters.
+- #116: per-process wait() (wait for process to terminate and return its exit
+  code).
+- #134: per-process get_threads() returning information (id, user and kernel
+  times) about threads opened by process.
+- #136: process executable path on FreeBSD is now determined by asking the
+  kernel instead of guessing it from cmdline[0].
+- #137: per-process real, effective and saved user and group ids.
+- #140: system boot time.
+- #142: per-process get and set niceness (priority).
+- #143: per-process status.
+- #147: per-process I/O nice (priority) - Linux only.
+- #148: psutil.Popen class which tidies up subprocess.Popen and psutil.Process
+  in a unique interface.
+- #152: [OSX] get_process_open_files() implementation has been rewritten
+  in C and no longer relies on lsof resulting in a 3x speedup.
+- #153: [OSX] get_process_connection() implementation has been rewritten
+  in C and no longer relies on lsof resulting in a 3x speedup.
+
+**Bugfixes**
+
+- #83:  process cmdline is empty on OSX 64-bit.
+- #130: a race condition can cause IOError exception be raised on
+  Linux if process disappears between open() and subsequent read() calls.
+- #145: WindowsError was raised instead of psutil.AccessDenied when using
+  process resume() or suspend() on Windows.
+- #146: 'exe' property on Linux can raise TypeError if path contains NULL
+  bytes.
+- #151: exe and getcwd() for PID 0 on Linux return inconsistent data.
+
+**API changes**
+
+- Process "uid" and "gid" properties are deprecated in favor of "uids" and
+  "gids" properties.
+
+
+0.2.0 - 2010-11-13
+==================
+
+**Enhancements**
+
+- #79: per-process open files.
+- #88: total system physical cached memory.
+- #88: total system physical memory buffers used by the kernel.
+- #91: per-process send_signal() and terminate() methods.
+- #95: NoSuchProcess and AccessDenied exception classes now provide "pid",
+  "name" and "msg" attributes.
+- #97: per-process children.
+- #98: Process.get_cpu_times() and Process.get_memory_info now return
+  a namedtuple instead of a tuple.
+- #103: per-process opened TCP and UDP connections.
+- #107: add support for Windows 64 bit. (patch by cjgohlke)
+- #111: per-process executable name.
+- #113: exception messages now include process name and pid.
+- #114: process username Windows implementation has been rewritten in pure
+  C and no longer uses WMI resulting in a big speedup. Also, pywin32 is no
+  longer required as a third-party dependancy. (patch by wj32)
+- #117: added support for Windows 2000.
+- #123: psutil.cpu_percent() and psutil.Process.cpu_percent() accept a
+  new 'interval' parameter.
+- #129: per-process number of threads.
+
+**Bugfixes**
+
+- #80: fixed warnings when installing psutil with easy_install.
+- #81: psutil fails to compile with Visual Studio.
+- #94: suspend() raises OSError instead of AccessDenied.
+- #86: psutil didn't compile against FreeBSD 6.x.
+- #102: orphaned process handles obtained by using OpenProcess in C were
+  left behind every time Process class was instantiated.
+- #111: path and name Process properties report truncated or erroneous
+  values on UNIX.
+- #120: cpu_percent() always returning 100% on OS X.
+- #112: uid and gid properties don't change if process changes effective
+  user/group id at some point.
+- #126: ppid, uid, gid, name, exe, cmdline and create_time properties are
+  no longer cached and correctly raise NoSuchProcess exception if the process
+  disappears.
+
+**API changes**
+
+- psutil.Process.path property is deprecated and works as an alias for "exe"
+  property.
+- psutil.Process.kill(): signal argument was removed - to send a signal to the
+  process use send_signal(signal) method instead.
+- psutil.Process.get_memory_info() returns a nametuple instead of a tuple.
+- psutil.cpu_times() returns a nametuple instead of a tuple.
+- New psutil.Process methods: get_open_files(), get_connections(),
+  send_signal() and terminate().
+- ppid, uid, gid, name, exe, cmdline and create_time properties are no longer
+  cached and raise NoSuchProcess exception if process disappears.
+- psutil.cpu_percent() no longer returns immediately (see issue 123).
+- psutil.Process.get_cpu_percent() and psutil.cpu_percent() no longer returns
+  immediately by default (see issue 123).
+
+
+0.1.3 - 2010-03-02
+==================
+
+**Enhancements**
+
+- #14: per-process username
+- #51: per-process current working directory (Windows and Linux only)
+- #59: Process.is_running() is now 10 times faster
+- #61: added supoprt for FreeBSD 64 bit
+- #71: implemented suspend/resume process
+- #75: python 3 support
+
+**Bugfixes**
+
+- #36: process cpu_times() and memory_info() functions succeeded also for dead
+  processes while a NoSuchProcess exception is supposed to be raised.
+- #48: incorrect size for mib array defined in getcmdargs for BSD
+- #49: possible memory leak due to missing free() on error condition on
+- #50: fixed getcmdargs() memory fragmentation on BSD
+- #55: test_pid_4 was failing on Windows Vista
+- #57: some unit tests were failing on systems where no swap memory is
+  available
+- #58: is_running() is now called before kill() to make sure we are going
+  to kill the correct process.
+- #73: virtual memory size reported on OS X includes shared library size
+- #77: NoSuchProcess wasn't raised on Process.create_time if kill() was
+  used first.
+
+
+0.1.2 - 2009-05-06
+==================
+
+**Enhancements**
+
+- #32: Per-process CPU user/kernel times
+- #33: Process create time
+- #34: Per-process CPU utilization percentage
+- #38: Per-process memory usage (bytes)
+- #41: Per-process memory utilization (percent)
+- #39: System uptime
+- #43: Total system virtual memory
+- #46: Total system physical memory
+- #44: Total system used/free virtual and physical memory
+
+**Bugfixes**
+
+- #36: [Windows] NoSuchProcess not raised when accessing timing methods.
+- #40: test_get_cpu_times() failing on FreeBSD and OS X.
+- #42: [Windows] get_memory_percent() raises AccessDenied.
+
+
+0.1.1 - 2009-03-06
+==================
+
+**Enhancements**
+
+- #4: FreeBSD support for all functions of psutil
+- #9: Process.uid and Process.gid now retrieve process UID and GID.
+- #11: Support for parent/ppid - Process.parent property returns a
+  Process object representing the parent process, and Process.ppid returns
+  the parent PID.
+- #12 & 15:
+  NoSuchProcess exception now raised when creating an object
+  for a nonexistent process, or when retrieving information about a process
+  that has gone away.
+- #21: AccessDenied exception created for raising access denied errors
+  from OSError or WindowsError on individual platforms.
+- #26: psutil.process_iter() function to iterate over processes as
+  Process objects with a generator.
+- #?:  Process objects can now also be compared with == operator for equality
+  (PID, name, command line are compared).
+
+**Bugfixes**
+
+- #16: [Windows] Special case for "System Idle Process" (PID 0) which
+  otherwise would return an "invalid parameter" exception.
+- #17: get_process_list() ignores NoSuchProcess and AccessDenied
+  exceptions during building of the list.
+- #22: [Windows] Process(0).kill() was failing with an unset exception.
+- #23: Special case for pid_exists(0)
+- #24: [Windows] Process(0).kill() now raises AccessDenied exception instead
+  of WindowsError.
+- #30: psutil.get_pid_list() was returning two instances of PID 0 on OSX and
+  FreeBSD platforms.
+
+
+0.1.0 - 2009-01-27
+==================
+
+- Initial release.