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.
Not sure this is all correct. 

"There may be cases where an action is ~~applicable~~ **not available** on this particular row. In this case, ~~the Encore-UI made sure~~ those particular ~~options~~ **links** were ~~invalid~~ **disabled** using the ~~subdued~~ `.disabled` class rather than not having them appear at all."

Is there an example of this somewhere in Encore we could link to?