xcode5, 4 inch retina, ios7, 64bit

update project and make it work with 64bit

I decided to update the minimum OS to 6.0 to be able to add 64 bit support. The demo app now runs fine in a 64 bit emulator as a 64 bit app. I also followed XCode's suggestion to add the 4" launch image, so that the app would launch without black bars on newer iPhones.