Remove jQuery dependency from Stage.js
Remove jquery dependency from Input
Update Stage.prependLayer to use hasChildNodes() instead of children.length to determine if Stage.viewport has any child Nodes.
Using hasChildNodes is much faster: http://jsperf.com/haschildnodes-vs-children-length-vs-children-0/3
Fix removeEventListener missing 3rd arguments that caused error in FF on windows.
Add Element.contains polyfill.
 * Merged remove/jQuery