Allow CommonReactiveSource to be created free threaded
Merge pull request #627 from reactiveui/allow_common_reactive_source_to_be_created_in_background

Allow CommonReactiveSource to be created free threaded
Goodnight, Sweet Prince
Rewrite JSON.NET on Xamarin to use a binary serializer
Fix up WinRT
Use DataContractSerializer on WinRT
Merge pull request #629 from reactiveui/no-more-json

No more JSON.NET
Rename some projects to be more consistent.
App.config nobody loves you.
App.config nobody loves you.
Get Rx from NuGet.
Get Splat from NuGet.
Update configs.
Add Rx-Xaml.
Delete the targets file.
Add Rx-WinRT.
No more Platforms and Mobile.
Get Json.Net from NuGet.
Add Rx-Testing and Json.Net
Remove all references to nuget.targets.