Make sure utility objects stay in paper scope.

src/util/CanvasProvider.js

@@ -3,7 +3,7 @@
 // speed by not having to do canvas.getContext('2d')
 // TODO: Run through the canvas array to find a canvas with the requested
 // width / height, so we don't need to resize it?
-CanvasProvider = {
+var CanvasProvider = {
 	canvases: [],
 	getCanvas: function(size) {
 		if (this.canvases.length) {
@@ -31,4 +31,4 @@ CanvasProvider = {
 	returnCanvas: function(canvas) {
 		this.canvases.push(canvas);
 	}
-};
+};

src/util/MathUtils.js

@@ -1,4 +1,4 @@
-MathUtils = {
+var MathUtils = {
 	// TODO: 64 bit: 53 digits, 32 bit: 24 digits
 	// TODO: Naming? What is MANT standing for?
 	MANT_DIGITS: 53,
@@ -211,4 +211,4 @@ MathUtils = {
 		}
 		return { b: b, area: area };
 	}
-}
+};