added overlay images and created prefabs, will work on spawning them
Merge branch 'master' of https://github.com/cjgendron/dragons-lair

Conflicts:
	Assets/GameScene.unity
	Assets/prefabs/dmg.prefab
	Assets/prefabs/dmg.prefab.meta
	Assets/prefabs/moneys.prefab
	Assets/prefabs/moneys.prefab.meta