Fix WinRT build when building on Windows 8.1 by violating international copyright law
Add ReactiveUI-Winforms package
Version bump to 5.1.0
Merge pull request #362 from reactiveui/ship-5-point-1

Fixes to ship ReactiveUI 5.1
Too many ways for this plan to go pear-shaped. Going back to the static constructor
Version bump to 5.1.2