* Fix ResourceWarning warnings in test_streams
* Return True from StreamReader.eof_received() to fix
  http://bugs.python.org/issue24539 (but still needs a unittest).
  Add StreamReader.__repr__() for easy debugging.
* remove unused imports
* Issue #234: Drop JoinableQueue on Python 3.5+

Move compatibility helpers for the different Python versions to a new
asyncio.compat module.

Patch by Jacek Kołodziej.

Original patch by Saimadhav Heblikar.

Patch written by Martin Panter. I replace tearDown() with addCleanup().

Patch by Brian Cain.

Patch from https://github.com/testing-cabal/mock/issues/215

could in Python 3.3.

Patch from Nicola Palumbo and Laurent De Buyst.

Patch by Chris Angelico

* queues: get coroutine from asyncio.coroutines, not from asyncio.tasks
* tets: replace tulip with asyncio in comments

The changes to Doc/library/unittest.mock.rst are almost entirely a
selective backport of the 3.5 page.

on OS X.  Original patch by André Freitas.