Script to reset DB and add basic fixtures

I found myself resetting the DB a lot, so I automated. It resets the DB, installs the migrations, updates the site object and installs fixtures for a formation (named 'dev') and a super user (with username 'dev' and password 'dev').

I've also added a gitignore for static, which is one of the symlinks that's created with `Vagrantfile.local`.