Added Course Homepage

![screen shot 2014-11-18 at 4 57 57 pm](https://cloud.githubusercontent.com/assets/910510/5112102/4853eba2-6ff3-11e4-8aed-f547a7a1c4cd.png)

Design: https://projects.invisionapp.com/share/RC1K3LDHD#/screens

@dsjen @rocha @marcotuts @shnayder 
Is a feature flag necessary?  It seems like we could release the functionality as is.