When a VS side window is brought up, it closes all other side windows, and closes itself when switching back to the main text editor. In this way we can avoid having the collapsed tabs for all the side windows, which just take up space anyway.
Removed non-XNA Gamepad code.
Created new build targets that don't depend on PinkyGame and Xna, so that PinkyTwirl can easily be compiled on computers without the Xna dependencies.