Cast audio playback enhancements

* Instant mix works, but not sure about managing the mix
* Shuffle _should_ work, but same thing with mgmt

Receiver page has also been enhanced for music playback.

MediaBrowser.WebDashboard/Api/DashboardService.cs

@@ -442,6 +442,7 @@ namespace MediaBrowser.WebDashboard.Api
             // jQuery + jQuery mobile
             await AppendResource(memoryStream, "thirdparty/jquery-2.0.3.min.js", newLineBytes).ConfigureAwait(false);
             await AppendResource(memoryStream, "thirdparty/jquerymobile-1.4.2/jquery.mobile-1.4.2.min.js", newLineBytes).ConfigureAwait(false);
+            await AppendResource(memoryStream, "thirdparty/jquery.ba-tinypubsub.min.js", newLineBytes).ConfigureAwait(false);
 
             await AppendLocalization(memoryStream).ConfigureAwait(false);
             await memoryStream.WriteAsync(newLineBytes, 0, newLineBytes.Length).ConfigureAwait(false);

MediaBrowser.WebDashboard/MediaBrowser.WebDashboard.csproj

@@ -653,6 +653,9 @@
     <Content Include="dashboard-ui\thirdparty\jquery-2.0.3.min.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="dashboard-ui\thirdparty\jquery.ba-tinypubsub.min.js">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="dashboard-ui\thirdparty\jquery.unveil-custom.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>