Added Vagrantfile for an independet development environment:
* Debian 7.4 image
* portmap 9090 (host) -> 8080 (guest)
* with Virtualbox: 2 GB RAM, 2 CPUs
* automatic maven installation
* automatic jdk-1.7_55 installation
* Added play! framework to vagrant provisioning
Merge branch 'master' into german-locale