Merge remote-tracking branch 'origin/rewrite' into rewrite

Conflicts:
	docs/route.md

render/render.js

@@ -516,6 +516,7 @@ module.exports = function($window) {
 	}
 
 	function render(dom, vnodes) {
+		if (!dom) throw new Error("Ensure the DOM element being passed to m.route/m.mount/m.render is not undefined.")
 		var hooks = []
 		var active = $doc.activeElement