Removed calling of no-op games_scores_startup()
Modified game to use new libgames-scores written in Vala.
Pass dialog label to libgames-scores.
Moved context_new to activate.
Fixed previous commit.
Signals for libgames-scores. 1st draft.

Signals mechanism doesn't work.
Signals for libgames scores. 2nd draft.

Doesn't work.
Signals for libgames-scores. 3rd draft.

Doesn't work.
GamesScoresCategory class now. Made changes accordingly.
Directly call run_dialog.
Successfully send category names from keys to libgames-scores.
Return NULL as category if non standard category key.
Got rid of warnings.
Merge branch 'nikhar/libgames-scores' into libgames-scores