Reactive-Extensions/Rx.NET — pull request #4 by paulcbetts (2014-04-03 00:47:55+00:00)
Title: Add Windows Universal support

This PR adds targets for Windows 8.1 + Windows Phone 8.1 Universal Apps. The output of `Release81` should be put under the NuGet profile `portable-win81+wpa81`.

Note, to build this profile, you'll have to install Visual Studio 2013 Update 2 RC