Fixed issue #27 regarding game case data.

Also, switching levels does not create a new case (this should only happen once 'new game' has been clicked).
Also removed some old/unused functions and removed old start screen code.
Removed commented out code, fixed some formatting, added some missing comments and fixed a small compiler warning.
Fixed level 2 always ending after finding 1 treasure. Added fade out effect to treasure found dialog on level 2. Added message to End Game dialog with the number of treasures found.
Merge branch 'master' of github.com:serg-srri-umass/TP-data-games
ShipOdyssey merged version is now 'v.2013-05-02'