Fixed projectiles in Shooter scenes.
To make projectiles work as they should, I made a few changes in VShooter to the mook.  I also reversed how entities are drawn: instead of being max -> 0 (so that player was drawn on top automatically), they now draw from 1 -> max, and the player is drawn on top manually.  This makes it so that entities added after the background tiles are created still render on top of them.  Also had to rearrange how maps add entities to make that work.