Port to Play 2.1.1

The version for Play 2.1.1 contains following changes:

* Complete rewrite of the UI
* Small adjustments to the localizations handling (saving, matching)
* Translation in en,de
* Code for publishing as maven artifact

Please consider merging this code. play-messages was a great tool on Play 1.x and should also be available for Play 2.1.
Once merged, the maven publish information and dependency in the "test-application" must be changed.