Finishing Grade usecase with a fake persistence. GET, POST, PUT and DELETE fully working.
Added an IdGenerator to avoid collision on the grade Id (This is temporary).
Add Procfile for Heroku
Add CORS filter to enable communication with Angular
Edit GlobalSettings to return Headers with every action
Fix var name in GlobalSettings
Edit the way to handle headers
Fix mistake in use case
Apparently we use Play 2.2 and the config needs to be different
Add one missing import
Add authorization for Content-Type
Merge branch 'usecase-grade' of https://github.com/NathanMarin/themis-back into usecase-grade
Merge branch 'usecase-grade' of https://github.com/NathanMarin/themis-back into usecase-grade