Changes

The mirrored mozbase packages are installed into [https://developer.mozilla.org/en-US/docs/Python/Virtualenv#The_Mozilla-Central_Virtualenv the mozilla-central virtualenv] instancevia the [http://mxr.mozilla.org/mozilla-central/source/build/virtualenv/populate_virtualenv.py populate_virtualenv.py] script. The Mozbase [http://mxr.mozilla.org/mozilla-central/source/testing/mozbase/packages.txt packages.txt] file is included from the master [http://hg.mozilla.org/mozilla-central/file/0c45e6378f1f/build/virtualenv/packages.txt#l15 packages.txt] file and is generated by [http://mxr.mozilla.org/mozilla-central/source/testing/mozbase/generate_diff.py generate_diff.py] to include all Mozbase packages (really, directories) in mozilla-central via [http://docs.python.org/2/library/site.html .pth files]. The various Mozbase packages are used in mozilla-central python code ''(TODO: more detail)''.