added rat sprite
Merge branch 'master' of https://github.com/CodeDayPortlandRPG/RPG.git

Conflicts:
	src/codeday/rpg/enemies/Bat.java
	src/codeday/rpg/enemies/Bow_Skeleton.java
	src/codeday/rpg/enemies/Minotaur.java
	src/codeday/rpg/enemies/Sword_Skeleton.java