Chap 09-18 from Mike Murphy

Submitting chapters 9-18 from Mike Murphy.  Thanks for all the work, Sheeri.  I had completed all chapters of the book by October before I knew we were stopping at 12.
![Chap13_ThreeTier](https://f.cloud.github.com/assets/3159628/317524/8ee82044-9875-11e2-8aaa-e476ede18713.gif)