reworked turn logic etc.

Renamed Player -> Unit
added player index, unit index, AP check
reworked turn logic
Merge remote-tracking branch 'origin/master'

Conflicts:
	Assets/prefabs/Blade_Girl_Prefab 1.prefab
	Assets/scenes/gameScene.unity
	Assets/scripts/GUI/GUImanager.cs
	Assets/scripts/GameManager.cs