Marge cleaned-up Mac Demo App into master branch.

Refactored and fully commented the "BKApp". Totally clean commit history should be an easy merge. Only 5 new files, and one new Target. Also gives a simple/clear example of how to link/copy this/any framework inside an app's bundle.

![130902-0003](https://f.cloud.github.com/assets/262517/1065983/f2080a48-13a6-11e3-9cd7-ecfc1d9c4aef.png)