Added PSD Zombie

- Added PSD Zombie
- Added Zombie material to SpaceZombie prefab
- Added Zombie material to SpaceZombieCombat prefab.
Merge branch 'master' of https://github.com/Lystlund/Loot-Quest

Conflicts:
	DungeonCrawler/Assets/Resources/Rat.psd.meta
	DungeonCrawler/Assets/Resources/black.png.meta
	DungeonCrawler/Assets/Scripts/textureScript.cs.meta