Theming for Keynotes pages

This is some theming relating the the keynote pages:

http://wk-theming-nyccamp2014.gotpantheon.com/session/atefeh-riazi

http://wk-theming-nyccamp2014.gotpantheon.com/keynote/robin-chase

Please review and confirm if we can push to live. Not that this is a separate DS layout that is already setup/configured on live, we just need to change the settings on the keynote nodes, which I'll do as part of pushing to live.

 Ideally we could improve some aspects, but for now it's better than what we have for those pages, which wasn't any different than the other sessions, and not really appropriate for a keynote.