Unlocked drawing, camera off scene, color, and scale change

Please review,

I've updated the following
* #208 Gray color constant
* #277 Moved camera to be off of scene
* #237 Changed to be a vector
* #354 Added UI actors for locked drawing
Could `addDrawing` have an overload like `addDrawing(ex.Texture)` (maybe use `default` as the key by default). One drawing is usually 90% of UI and actor drawing unless it has states.