Fix speedChess bug around moving pieces multiple spaces.
Merge pull request #13 from AlexLandau/speedChess

Fix speedChess bug around moving pieces multiple spaces.
Added a link to the developers site to games.ggp.org
Add various difficulties of Sudoku
Remove DOCTYPE from Sudoku XSLTs
Merge pull request #14 from SteveDraper/master

Add various difficulties of Sudoku