Added entity health features

Added a entity health component.
Added a entity health bar component.
Merge branch 'master' of https://github.com/jmckniff/RPG

Conflicts:
	Assets/Scenes/scene 1.unity
	Library/CurrentMaximizeLayout.dwlt
	Library/ScriptAssemblies/Assembly-CSharp.dll
	Library/ScriptAssemblies/Assembly-CSharp.dll.mdb
	Library/assetDatabase3
	Library/guidmapper