Prefix category methods on Foundation classes with 'box_'
Remove implementations of shouldAutorotateToInterfaceOrientation:

This method was deprecated in iOS 6. As of d4b4d410a5e7c96b230dec1bf8d355b32e4328a9,
the SDK targets iOS 6.0, dropping support for iOS 5.
Merge pull request #74 from box/category-prefix

Prefix category methods on Foundation classes with 'box_'
Merge pull request #75 from box/ios6-deprecation

Remove implementations of shouldAutorotateToInterfaceOrientation:
Updated copyright, license, and contribution guidelines