• Enable the c-ares resolver extension for PyPy.
• On some versions of PyPy on some platforms (notably 2.6.0 on 64-bit
  Linux), enabling gevent.monkey.patch_builtins could cause PyPy
  to crash. Reported in #618 by Jay Oster.
• gevent.kill raises the correct exception in the target greenlet.
  Reported in #623 by Jonathan Kamens.
• Various fixes on Windows. Reported in #625, #627,
  and #628 by jacekt and Yuanteng (Jeff) Pei. Fixed in #624.
• Add readable and writable methods to FileObjectPosix;
  this fixes e.g., help() on Python 3 when monkey-patched.