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.
@parlarjb Maybe we append `Encore-UI` to all the page titles for the demo site via the rxPageTitle service? In the demo.js, we'd just add `rxPageTitle.setSuffix('Encore-UI')`.