Updated the Gruntfile. Also:

InputHandler.pixelPerfectOver - performs a pixel perfect check to see if any pointer is over the current object (warning: very expensive!)
InputHandler.pixelPerfectClick - performs a pixel perfect check but only when the pointer touches/clicks on the current object.
Previously using a Pixel Perfect check didn't work if the Sprite was rotated or had a non-zero anchor point, now works under all conditions + atlas frames.

build/config.php

@@ -70,7 +70,6 @@
     <script src="$path/src/geom/Ellipse.js"></script>
     <script src="$path/src/geom/Polygon.js"></script>
 
-    <script src="$path/src/pixi/Pixi.js"></script>
     <script src="$path/src/pixi/core/Matrix.js"></script>
     <script src="$path/src/pixi/display/DisplayObject.js"></script>
     <script src="$path/src/pixi/display/DisplayObjectContainer.js"></script>