Updated for iPhone 5 Compatability

Updated to be compatible with iPhone 5 4 inch screen. Fine tuned aligning on picker in both landscape and portrait orientation. Tested with iOS version 4.3, 5.0 and 6.0 on standard 3.5 inch screen, retina 3.5 inch, and 4 in screens in simulator. Updated sample code to be testable on 4 inch screen (added 4 inch splash image).