Order explicitly VerbNetFrameSet with 'tree_id'
Ignore backups and verbenet export
Add a LADL inversed index
Ignore generated CSS
Ignore generated files in public/
Upgrade to bootstrap 3.3
VerbeNet -> Verb∋Net
Migrate DB for fixed tree ordering
Sort and link classes in reversed LADL index
Require Django 1.7.1 due to migration file