Use morphdom if available

[danstewart]

https://github.com/patrick-steele-idem/morphdom

Morphdom is a module for efficiently updating the DOM tree.

Currently the rendering logic only works on single elements but would be good to support rendering a full component and using morphdom to do the updating.

Morphdom should be optional.

It should be on the user to include it if they want it and if they don't we just update the DOM the usual way.