typo
Bumping vagrant boxes RAM
I ran into failures to compile/install platform requirements and bumping the
RAM fixed them.
replacing linein with sed
command->shell
updating command
adding more requirements
adding GIT_MIRROR
updated README to use 'Open edX'
added additional people missing from AUTHORS file
Merge pull request #343 from edx/carsongee/increase_vagrant_memory

Bumping vagrant boxes RAM
updating comment blocks for devpi and gh_mirror
adding comment block for supervisor role
adding collection param.
updating venv dir
Merge branch 'master' into jarv/mirror
Merge pull request #342 from edx/jarv/mirror

Jarv/mirror
Merge pull request #330 from edx/e0d/docstore

MERGE_WITH_CAUTION: E0d/docstore
renaming storage_base_dir to data_base_dir
app_base_dir and data_base_dir changed to app_dir and data_dir
consolidates and refactor common role