Added Decsions and actions based on emeny health and player health

- Character is now sperated into seperate parts
- All new animations for each action
- Weapon swapping is added
	-> Create weapon asset, add sprite, drag onto players 'weapon'
	object (see hierarchy)
- A bit of organizing, feel free to do more

Enemy is taking damage but player is still not....for some reason

Please keep Left is true and Right is false
Started to add player health

DECISIONS TREE CLASS:
- Made lots of members private to remove Unity warnings
- Removed parameters we didn't need from a few functions

ENEMYAI:
- Few structural changes, BuildDecisionTree seems to work in start() now
- Now denoting actions with "a_ACTIONNAME" and decision with
  "d_DECISIONNAME".  Easier to read!

So Smart

YAHOOOO

Main scene with walking animation, doors to other scenes but bug when
exited. (appear at random door)