Added concurrency protection to broker (original file by Jorge)
Changed broker to follow syncronization lock conventions.
Updated GitHubBroker. Callback instance now has to be provided for all callback methods. Disconnect is not a callback method anymore. Tests and related files have been updated.
Added tests for null callbacks.
Fragments preview for Andreas and Johnny
We have kind of a splash thingy
Cleanse. Set up the real GitHub password restrictions.
More cleaning. Bugfixing.
Added the per-resolution files corresponding to ic_arnold.png.
semiworking repo retriever
Added Arnold image to the Login activity.
Fixed again the conflicts with the repo selector branch.
Fixed index-out-of-bounds bug in GitHubBroker.
Removed unused callback method from GitHubBrokerListener.
Pull-merge with branch