Game activity spec proposal

Please Review the SampleGameActivity Class if interface to the GameActivity makes 
sense and covers all the use cases. 
@java99 @orangeman @jborchardt 

https://github.com/ANDLABS-Git/studio-lounge-droid/blob/a71c23692edfa7ea8bfaef06dd1d685f9a8008a9/test/src/eu/andlabs/studiolounge/spec/SampleGameActivity.java