Code style cleanup and small fixes, up to EditorGameState.cpp,h

 - Added missing copyright headers
 - applied the code convention, mostly respecting 4 spaces as indentation.
 - Made sure members were initialized
 - Added m in front of members, eg: mSpeed.
 - Grouped functions together when they were mixed with members.

I also started simplifying the EditorMode class code
but I'll finish that in another commit.