Reset the scout position when restarting the level
Die quicker!

For now. :-)

This is to make it easier to check that the right things are happening
when we change between states.
Move the HUD class into a separate file.

I was spending waaaay too much time scrolling back and forth through main.js.
Move the FPSControls into a separate file.

Phase 2 of the Grand Source Code Scrolling Reduction Plan.