Add/Modify group translation
Add/Modify user translation
Modify user test data
Rework authentication ref #123
Modify Authentication for a more secure access

E-mail and username are now correctly stored in database.
ref #123
Change login-field to email-field and add translations

ref #123
Changed authentication process for admin, ref #123

 - moved unique constraint of Users identity_url to email
 - admin has nil identity_url
Removed unused method in seesion controller, ref #123
Fixed specs, ref #123
Added tests for authentication, ref #123
bug fix for missing icons in deployed version and changing assignment status when marking task as done
Disable mail delivery errors
Tasks are sorted per Event not globally
Merge branch 'Axolotl' into A/feature/#52
merge Axolotl in a/feature/#90
divide dashboard task list in two panels; adjust locales
Update E-Mail configuration for production environment
Merge branch 'Axolotl' into dev

Conflicts:
	config/environments/production.rb
*finally* fix bug when marking task as done
remove return_urls