DO NOT MERGE YET: Demo site V2

Looking for team feedback (copy, angular.js optimization) for the V2 style guide demo site. (rackerlabs.github.io/encore-ui/)

Going to continue submitting commits, especially those marked FIXME.
We really need to decide, once and for all, if we're going to use "EncoreUI" or "Encore-UI", or "Encore UI"