Unify and simplify the implementation of Queue.get and Queue.put. Fixes #647 (add a test case for that scenario).

Fix a regression introduced with PyPy support in 715a7071 that caused the timeout to be ignored for socket.makefile objects under Python 3. Fixes #644

Patch signal.signal(SIGCHLD) to cooperate with child watchers

Ref #622 : Patch signal.signal only for SIGCHLD to work with libev child watchers as used by os.waitpid.

PyPy 2.6.1 is out with CFFI 1.3.0 support, fixing our signal handling issue in a release version. Update the docs to note this. [skip ci]

Change many important assert statements to explicit if tests so they get executed even when optimizations are enabled with -O and errors and impossible states don't go on silently undetected possibly losing data.

Since I'm not maintaining gevent anymore, @jamadden does.

https://github.com/gevent/gevent/graphs/contributors?from=2015

Make _NoopLog better match a file-like object in case its used as wsgi.error. Doc cleanups in pywsgi.

Quiet lookup errors from the threadpool by default. Ref #617 that was also mentioned in a private email.

This masks an underlying PyPy bug referenced in the changelog, so it's still not as efficient as it
could be, but it's the best we can do on currently released PyPy.

Impact for CPython2 appears negligible (and none at all for CPython 3, since we don't support PyPy3).