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delocate-listdeps is not required and can take a several minutes for
heavyweight wheels.

delocate-listdeps is not required and can take a several minutes for
heavyweight wheels.

Fix "cd" overridden by RVM.
Don't try to uninstall virtualenv if pip is not installed.

* [osx] don't update homebrew

* [docker] move activate_ccache until after utils are loaded

* [manylinux_utils] create cccache directory

* [manylinux_utils] fix case

* [osx/ccache] disable maxsize

* [osx_utils] move  code and add comment

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

Use proper activate sourcing for virtualenv

Fixed typo in spelling

This reverts commit 4e3515d8.

Python 2.6 installer has 10.3 suffix.

See:
https://github.com/matthew-brett/multibuild/issues/24#issue-221951587

Functions renamed to match their intent better.

The syntax is similar to how TravisCI does it.

Travis test uses `get_macpython_enviroment` for CPython and
`get_python_enviroment` for PyPy.

Aliased PYTHON_VERSION to MB_PYTHON_VERSION.

Changed the test command to use get_python_enviroment instead of
get_macpython_enviroment.

Extended TravisCI matrix to cover PyPy.
The tests can now tell the implementation of PyPy apart from the CPython
version they emulate.