Removes all mobile platform projects and moved their channels into the main PCL.
Removes all use of MEF.
Consolidated the channel classes.
Removes all platforms from nuspec file.
Adds missing xml doc comments.
Fixes build of NuGet package.
Updates target frameworks.
Fixes console app.
Fixes StyleCop messages.
Fixes WPFChatroom app.
Reduces IronPigeon NuGet package to just the PCL assemblies. No more platform assemblies.