MASSIVE update to combat engine. lots of changes

almost finshed the combat engine, jutsu is not implemented yet, only
melee attacks.  healing with items and a better health system (bleedout
funtion) added loading a save game feature (but no saving yet XD )
removed inventory feature and instead added ammo variables.  added a
rudimentary ai (for some reason the range/distance function isnt working
properly, defaults to melee range every time. will figure that out
later...)
adde healing by foodpills, and bandaging to stop bleedout.