GitLab

MRG: enable use of ccache

Enable use of ccache with environment variable toggle.

Updating outdated link to Cython wiki.

MRG: OSX: never update homebrew

Workaround for travis-ci/travis-ci#8552 .  Also see 
https://github.com/fonttools/fonttools/issues/1068

Merge branch 'master' into 'devel'

MRG: Updated Python versions

MRG: Changed openjpeg archive prefix for versions newer than 2.1.0

This is a better place IMHO because it parallels where it's set up in docker.

This installs ccache from homebrew, activates it, and verfies its operation.

Link the docker ccache directory to the VM; install and verify that ccache is operating correctly

[library_builders] allow to override tar.gz extension in build_simple

Here, we pass both the USE_CCACHE variable and the CCACHE volume to docker.

* devel:
  Continue search for delocate install fix
  Fix (maybe) command for downgrading wheel package
  BF: fix breakage for wheel 0.30 and Python 2.6
  Add MB_PYTHON_VERSION env var to test container

* devel:
  Use virtualenv activate for setting path
  Updated Python version

Use proper activate sourcing for virtualenv

Updated Python versions

MRG: Briefly describe AppVeyor usage for Windows wheels

Fill out README for Windows stuff