- Adds Process._authkey alias to .authkey for 2.7 compat.
- Remove superfluous else clause from max_memory_per_child_check.
- Document and test all supported Python versions.
- Extend 'Process' to be compatible with < Py3.5.
- Use a properly initialized logger in pool.py error logging.
- _trywaitkill can now kill a whole process group if the worker process declares itself as a group leader.
- Fix cpython issue 14881 (See http://bugs.python.org/issue14881).
- Fix for a crash on windows.
- Fix messaging in case of worker exceeds max memory.
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