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 
Data is fed to the template and there seems to be just enough logic in creating the lens structure display that it seems worthwhile to ensure it's rendered.  I'm not suggesting to test everything--maybe just that there are the expected number of rows in the table (and that the table exists).