Xamarin.Forms 1.3.1 pre1

Support for Xamarin.iOS 64 bit in beta channel. Requires Xamarin.iOS 8.6.0.0 or newer.

Xamarin Workbook

If it's not already installed, install the Xamarin Workbooks app first. The workbook file should download automatically, but if it doesn't, just click to start the workbook download manually.