Refactors notification email
Adds invitation service
Adds invites controller
Fixes Devise warning
Factors out LoginServier
Adds inviation UI
Speeds up role playing
Adds authorization to invitations
Fixes team menu
Fixes invite form layout
Fixes #34.
Merge branch 'master' into invite-users-34
Fixes breakage in role-playing
Merge pull request #157 from mezis/invite-users-34

Invitations