Integrate ID library and use it to track logged in users.

Quick way of detecting logged in users.

Manually added ID client side toolkit to components. This will need to be bower'd in from somewhere at some point, after discussion with ID (they're worried about keeping different repos in sync).

I decided not to load this async because it's required for the Omniture call, and I don't want to hold it up behind another call.

The library does a bit of UI stuff - there's probably a case for requesting a lighter weight one that doesn't.