Small Additions

Turned Ammo prefab into EnemyAmmo and PlayerAmmo.  NPC1 will deactivate
if health falls to zero in space maze. Experimented with camera. There
is a WoW style camera you can try in Space Maze, but it does weird
things. I scaled down models in Space Maze so that they are around the
same size as in Grassy Field.  I still have not added NPC1Health, etc.
to Grassy Field.  There are no WordGems there yet either.