GitLab

* Don't update homebrew

This was accidentally committed.

* [tst:multibuild] run library_builders in manylinux

* [tst:multibuild] fix

* [tst:multibuild] source linux steps

* [travis] require sudo on linux

* [tst:multlibuild] touch config

* [travis] drop sudo for precise

* [tst:multibuld] cleanup

* [tst:multibuild] check for docker

* [tst:multibuild] fix docker check

* [tst:multibuild] drop docker

* [tst:multibuild] fix command

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.