In order to use `can-element` in JSBin, we should add [`CustomElement`](https://github.com/canjs/can-element/blob/master/can-element.js#L74) and [`Element`](https://github.com/canjs/can-element/blob/master/can-element.js#L76) to can-namespace.
In order to use
can-elementin JSBin, we should addCustomElementandElementto can-namespace.