Rotate camera to 45 degrees.

Recalculated dodge and move direction input.
Walls now can fade.

Tween fading utility added.
Script to hide walls added.
Prefabs modified.
Layer for temporary walls added.
Refactored TweenFade to allow any target alpha and always work!
Merge branch 'dungeon-walls'

Conflicts:
	Assets/_Scenes/Arena_Luke.unity
Made spear prettier.