Added responding to attack and auto attack.
Combat Update

Fixed bugs in CombatScript and added first mover advantage
Combat, monster level and duplication, and sprites

Refined combat, monsters level up and duplicate, and added new soldier
sprites.
Merge branch 'master' into John-2

Conflicts:
	Assets/Scenes/CityView3.unity
	Assets/Scripts/CombatScript.cs
deleted files
Merge branch 'John-2'