Updating Silo functionality in the Gem

I've overhauled the Silo functionality in the gem.  It will now work with objects and convenience methods to provide a better interaction to Create, Read, Update, and Delete silos, silo profiles, and multitenant users.

![excited](https://f.cloud.github.com/assets/2287166/2387937/a3acfd82-a93c-11e3-8652-3fe083fd9781.gif)