Highlight background of entire bar view & insert bar

Closes #68 

I'm not getting terribly particular about the exact color and styling at this moment.  That will be resolved in #69.

![ios simulator screen shot dec 30 2014 2 48 17 pm](https://cloud.githubusercontent.com/assets/373903/5582690/f28c6842-9032-11e4-962c-34baa751db05.png)