Added sidebars for About and Feature pages. Made page routes shallow.

Fixes #55, Fixes #36, Ref #88
![screen shot 2014-02-05 at 11 59 01 pm](https://f.cloud.github.com/assets/92044/2095942/2e26a966-8ef5-11e3-900a-2783cbfbdc9c.png)
![screen shot 2014-02-05 at 11 59 10 pm](https://f.cloud.github.com/assets/92044/2095943/2e363d4a-8ef5-11e3-9b39-169d0a2de916.png)