Setting up for windows store build

- update NGUI
- update Unity
- modifierd LitJson version
Moved MapData into the Scene
Type -> Element; new ScritableObjects Element, UnitData, Attack
Get Units from Scene instead of GameData
Clean up GameData Editor and stuff (not longer in use)
Fix: Not-Save-Asset-Bug; Change: Attack default direction is now (0,1)
Convert old .json GameData to new Asset system