Add support for iPhone 5

[DataGraham]

I need this to automate capturing of screenshots at iPhone 5 aspect ratio, which are now required for App Store submission. It seems there may be a value that could be passed to [DTiPhoneSimulatorSessionConfig setSimulatedDeviceFamily] that would achieve this. I don't know that number would be however, as this "DTiPhoneSimulator..." SDK seems to be undocumented. Existing code seems to only use 1 for iPhone or 2 for iPad, and I haven't had any luck changing this to 3 or 4. I know the iOS simulator supports iPhone 5, however, as hardware "iPhone (Retina 4-inch)", so this should be possible.

Thanks.