Allow size and point to be a single number as a shortcut

So you can do layer.size = 10 to get a 10 x 10 layer.

framer/Layer.coffee

@@ -298,13 +298,15 @@ class exports.Layer extends BaseClass
		get: -> _.pick(@, ["x", "y"])
		set: (point) ->
			return if not point
			point = {x: point, y: point} if _.isNumber(point)
			for k in ["x", "y"]
				@[k] = point[k] if point.hasOwnProperty(k)
				
	@define "size",
		get: -> _.pick(@, ["width", "height"])
		set: (size) ->
			return if not size
			size = {width: size, height: size} if _.isNumber(size)
			for k in ["width", "height"]
				@[k] = size[k] if size.hasOwnProperty(k)