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Added a more explicit warning to the Fullscreen property.
Fixes #378

useless and opens VLC gui

This reverts commit 18611f09.
Task never returns because the reverse native callback doesn't set the tcs properly.

Fixes #364

Worked fine for mono/cocoa

README: Fix badge 404 URL

avoids hitting
> error MSB3644: The reference assemblies for .NETFramework,Version=v4.0 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks
and no good reason to do it by default anyway

The LGPL license is not very common in the dotnet world,
so people should check their assumptions and make sure they understand what it allows and doesn't allow.

too many issues with the gitter app

VideoLAN.LibVLC.WindowsRT doesn't exist

autogen by VS every time