others.

This is CEF Python 55.1 beta release with Chrome 55 from beta channel.

Add support for Python 3.6 (#121).

Update to Cython 0.25.1 (#110).

Build cefpython .so modules using clean Python installations as in pyenv
to avoid invalid symbols being embedded in the .so module (#266).

Update CEF include/.
Update patches/.

Update compile.py. Run unit tests first and don't run gtk3 example
temporarily until #261 is fixed. Check if Cython version installed
is the same as specified in tools/requirements.txt.

Update examples - print filename when logging messages.