On bootstrap, run make to initialize git submodules, build css and js files
Finding OL ROOT from script path instead of hard coding.
The OL user is not configurable at the top of the script.
Changed the sitename in nginx config to 0.0.0.0
hard coded OL_ROOT to /vagrant.

finding the OL ROOT from script name didn't work with vagrant as it runs
the script as /tmp/vagrant-shell.
Removed absolute path /vagrant from Makefile.
Merge branch 'master' of github.com:internetarchive/openlibrary