Reorganized map prefabs

Issue - missing sprites and references for several menu buttons
Reorganized Prefabs, Initial Japanese map created
Moved Towers

There isn't enough vertical distance between two spawning towers to fit
a squad of enemies through. By placing the ability towers across from
the spawning towers, there leaves a gap where peasants can move without
being engaged by friendly units.
Added Health Bar to King
Fixed: dummy texture wasn't always destroyed
Added all cooldown bars to ControlPane

The control panel destroy cooldown bars that have no associated tower.
Abilities can target locations

Right now, the heal ability does nothing if it targets the ground.
Added AoeTower

Issues
- Uses same particle effect as Ice bomb
- Damage is set to 1000 (add variance/knockback?)