Update doorkeeper to work with API Client
Add group generation

* Add group generator to division model
* Add team role to seed
* Simplify division controller
* Add edit action to division controller
Replay old policy validation for divisions
Improve spec for division controller
Make DivisionsController#generate idempotent
Merge branch 'master' into group-generation
Merge pull request #14 from elisapp/group-generation

Add group generation
Fix group generation for no unassinged participants
Merge pull request #15 from elisapp/group-generation-fix

Fix group generation for no unassinged participants
Add deployment configuration for Capistrano. Switch to unicorn.
Remove Ruby version from Gemfile
Update mailer configuration for use in production with mailgun.org
Fix wrong command for branch in deployment script
Disable cache:clear in deployment script
Merge remote-tracking branch 'origin/master' into user_interface
Re-style buttons. Make the orange pop more. Add some margins. Change font to Roboto.