Update names to ShatteredPixelDungeon com.shatteredpixel.shatteredpixeldungeon
Rename PixelDungeon.java to ShatteredPixelDungeon.java
Rename watabou/pixeldungeon -> shatteredpixel/shatteredpixeldungeon
Updated name of gwt.xml file
Rename and fix imports/classes in GDX area + set version to 0.2.2