creating page for dance.js Dec 13th, JSFest

@mikeal what do you think of this as a start for JSFest Oakland, archived the last event and modified @zeke's design slightly.

A few things:

* @nexxy would you be interested in performing a DJ set?
* @gsilk does the description of your talk seem appropriate?
* @ceejbot you're up for playing something mellow for the first performance of the night?