Fixed animation crash

Fixed - Game crashes when some animations play

The animation's parent FixedUpdate function was being called before
Start() resulting in the animation state being uninitialized. Replacing
Start() with Awake() guarantees that the state is initialized before any
FixedUpdate or Update calls or made.
Made changes to fix the storybook advancing;
Heal has GetCoolDown method;
Bug Fixes

Fixed - Out of range exception in StoryBook
Fixed - Enemys don't spawn in a release build
Attack animation initial commit

Created separate controllers and prefabs for Enemy and Friendly units
  - Reusing the same controller with different animations requires UnityPro

Added attack states to animation controller and Unit animation script
Added transition to attack states in Unit class
Added heal cooldown bar to control panel
Balance tweaks
﻿Additional animations

BUG - Archers look backwards before engaging new targets
Additional animations
Balance Tweaks
Heal works on the king now;