Summary:
The C# wrapper project has been changed to a NETStandard (1.1) PCL allowing it
to be consumed by any project targeting .NET4.5 or greater including .NETCore
and UWP projects... The C# wrapper uses P/Invoke to call into the Native Yoga
DLL...
The "Yoga" C++ project has been updated to support ARM builds...
Added the ability to generate nuget packages for the C# wrapper that supports
copying the native DLLs to the target output directory.
Closes: https://github.com/facebook/yoga/pull/283
Reviewed By: splhack, emilsjolander
Differential Revision: D4381455
Pulled By: JoelMarcey
fbshipit-source-id: e6dc4190caa824ac63d5d5ee2eb4c7914efbb00f
