Update to 2.1.2:

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.

(wiz)