Version 2015 R1: Support for Xamarin Unified API

This release adds support for Xamarin Unified API that makes it simple to share code between iOS and Mac. More importantly, it also makes it possible to target both 32-bit and 64-bit Apple platforms with the same binary. Apple now requires that all new iOS submissions to the App Store support 64-bit platforms, and from June 1st, this requirement will apply to application updates as well. If you are developing a Xamarin.iOS application using one of our components, you should upgrade as soon as possible.

(For a complete list of changes, see the release history.)