v1.2.10 Fix for .NET Standard

Fix package license

v1.2.8 Add Methods to Make Writing UIs Easier

UICollectionView is a beast and wants a weird ordering of operations. Now a ListDiff can calculate the best batched operations to update the UI.

Performance and Correctness

This version will only allocate internal lists if the data sources don't support IList.

This also is the first unit-tested version.

Improve NuGet Packaging

Xamarin installs all of .NET Standard when you use normal packaging. This works around that bug.

Initial Release

This is the first .NET Standard 1.0 version of this library.