+ about to move new GameRectangle

! GameRectangle

+ make basic properties for abs, tile and room
+ make in_points for abs,tile,room
+ make keep_in_points for abs,tile,room

! test with MySprites
test basic properties (pos for abs,tile,room)
test in_bounds (for abs,tile,room)
test keep_in_bounds (for abs,tile,room)