Alchemy integration

This is not ready to be merged - but I wanted to make it easy for you to pull down the GraphGist with alchemy powering the viz.

Please start ticketing things:
* bugs with can go in the [Alchemy.js repo](github.com/GraphAlchemist/alchemy) (I noticed a couple already)
* same with feature requests (FYI lots more coming out in 0.3 this week)
* implementation ideas can be ticked in graphgist or my fork, just make sure and tag me