Add footer to discussion page

With language select on left hand side and site links on right hand side (just About for now, but could have Blog there too).

![screen shot 2013-07-03 at 7 19 26 pm](https://f.cloud.github.com/assets/970124/741606/2e94ad02-e3b1-11e2-875c-b545f2964f0d.png)