Update route.js

URLs with a  `root` set to anything other than "/" results in an empty `{}` returned from `can.route.deparam`.

```javascript
can.route.bindings.pushstate.root = "/app/";
can.route("", {section:""});
can.route(":section/");
can.route.ready();
			
console.log( can.route.deparam(can.route.bindings.pushstate.root+"test") );
```