Update for latest virtual-dom

[WorldMaker]

It appears that this has gotten out of sync with recent changes to virtual-dom: this is producing tag keys, but virtual-dom seems to want tagName now. Perhaps this should instead compile to use the virtual-dom/h virtual hyperscript helper to maybe avoid future object representation changes?

[Swatinem]

This was never intended for the npm virtual-dom anyway, but rather https://github.com/Swatinem/virtualdom

The experience I have made with virtual-dom/h is that it is horribly slow, sometimes spending as much as ⅓rd of the time in there. (I have used mercury in another project)

Anyway, I am not really maintaining this any more. I am happy to add you as a maintainer if you are willing :-)

[WorldMaker]

Yeah, I wanted a template language for Cycle, which uses virtual-dom, and already had a node app that was using Jade server-side... I'll take a look and see if I can come up with a decent approach to support virtual-dom.

[Swatinem]

I added you as a maintainer so knock yourself out :-)