Releasing the gem for rails 3.2

We have extracted this gem from Wingolfsplattform to an extend where it can be run
separately. Currently, the gem requires rails 3.2.

Trello: https://trello.com/c/xNg29bVp/69-your-platform-gem

Wingolfsplattform: https://github.com/fiedl/wingolfsplattform

YourPlatform: https://github.com/fiedl/your_platform