Removed nupkg and theatre nuspec

Created nuspec for MediaBrowser.Common.Internal.
Amended the project build events for the new nuget package.

MediaBrowser.ClickOnce/MediaBrowser.ClickOnce.csproj

@@ -55,6 +55,9 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <PropertyGroup>
+    <PostBuildEvent>xcopy "$(TargetPath)" "$(SolutionDir)\Nuget\dlls\" /y /d /r /i</PostBuildEvent>
+  </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">