Migrated Beagle to Eclipse Luna and maven scripts to Tycho 0.21

Hello!
I'd like to submit a patch to Beagle with several minor updates:

Beagle Migrated to Eclipse Luna (manifests and target platform updated)
Maven scripts migrated to Tycho 0.21 (instead of raw repositories it now uses target platform dependencies only).
Eclipse project files added because why not :)

Open issues: tests project cannot be compiled because of its jar dependency. Cannot find it as maven or p2 dependency.