Facebook Support.

* Modified setup.sh to handle .pkg files, since that's how the facebook SDK is packaged.
* Added Facebook config Info.plist (and re-ordered items so URL Schemes are at the bottom,
  since you need to modify one).
* Hooked up facebook login button with super simple workflow.
I remajiggered this script a bit to allow "pkg" SDK's in addition to "zip" SDK's since the Facebook SDK comes as a pkg. :-(