iOS 5.1 support and Map Annotations

Map annotations are being used now to send you to details screen via disclosure button. Annotations work properly the second time you access a map screen, but not the first (this is an open bug that needs to be fixed).
* Added `memberData` property to `MapItem` object so details can be passed from annotations.
* Linked with proper MKAnnotationView using disclosure indicator.
* Set up data passing and segues for disclosure indicator transitions.
* Wrapped the tab bar's BigMapViewController in a UINavigationController so DetailViewController could get pushed.

Also making the project iOS 5.1 compatible:
* Disabled Storyboard Auto-layout
* Added manual struts and springs to UI elements in storyboard
* Removed disclosure segues and replaced them with manual `performSegueWithIdentifier` calls
Merge branch 'master' of https://github.com/CPLamb/ThinkLocalFirst