Update to Xcode 5's recommended settings
Add explicit integer type casts to avoid warnings.
Move instance variables from header files to implementation files.
Update to TestFlight SDK 3.0.2
Remove obsolete sample data.
Update to new handle new JSON format.
Upgrade xib and storyboard files for Xcode 5
Update references to dcm15 to dcm16
Fix appearance of Tweets view on iOS 7
Fix various appearance issues on iOS 7.