Yarko's `$BASE` patch has been merged and rewritten since
the original pull request was created, resulting in the `$BASE` being
incorrectly set to the default `/home/vagrant/edx_all` by the new code.
Cf README, this adds support to install and setup a dev instance through
Vagrant. The Vagrantfile at the root handles the vagrant commands like
`vagrant up`.
Provisioning is done by the shell script `vagrant-provisionning.sh`,
which is a light wrapper around the `create-dev-setup.sh` which does
most of the job using the standard process, but limiting possible
side-effect by ensuring the environment on which the install is
performed is clean.
Based on an Ubuntu precise 12.04 LTS.
