Updated to Xamarin.Forms nuget 1.2.3.6256-pre4
FontExtensions for Droid
Merge from Upstream/Master
Added support for custom TypefaceCaches
Fixed typos in droid FontExtension
Fixed button page font loading on iOS
Code formatting
Fixes to iOS ExtendedLabelRenderer
Merge pull request #352 from Applifting/Feature-DroidFontExtensions

Feature - Droid FontExtensions