replace enemy hp_per_minute with hp_regen_base
bug fix for allies remaining after respawn

fixed a bug which would allow allies to remain on the map after player
death if the player presses enter before the death animation finishes
Merge remote-tracking branch 'ryandansie/minions2' into cutscenes_and_refactoring_and_minions

Conflicts:
	src/EnemyManager.cpp