Changed Dialogue trigger type to string

Allows new triggers to be added without modifying the dialogue manager
class.
Removed thumbs.db
Updated bar colors, Added cooldown bar for Heal tower
Added individual troop levels
Moved unit experience to UnitUpgrades class
Units now level up with experience
Enemies prioritize troops over the king or tower

This prevents players from letting the tower or king tank the peasants.
Fixed tower spawning bug
Added dialogue triggers for king's health
UI Tweaks

Added blank gui for empty dialogue
Replaced WaveCounter with single number
Removed leading 0s from gold counter
Double-click on a rally point to force move
Fixed Mage weapon

All kills now grant experience
Enemy mages can hurt the king
Particle emitter renderer is in the correct sorting order
Added heal cooldown in from my branch;
Refactored Force Move activation mechanic
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