add optional package filter and remove IUIPlugin interface

MediaBrowser.Common/MediaBrowser.Common.csproj

@@ -85,7 +85,6 @@
     <Compile Include="Net\MimeTypes.cs" />
     <Compile Include="Net\WebSocketConnectEventArgs.cs" />
     <Compile Include="Plugins\IPlugin.cs" />
-    <Compile Include="Plugins\IUIPlugin.cs" />
     <Compile Include="Progress\ActionableProgress.cs" />
     <Compile Include="Properties\Resources.Designer.cs">
       <AutoGen>True</AutoGen>

MediaBrowser.Common/Plugins/BasePlugin.cs

@@ -299,7 +299,6 @@ namespace MediaBrowser.Common.Plugins
             var info = new PluginInfo
             {
                 Name = Name,
-                DownloadToUI = this is IUIPlugin,
                 Version = Version.ToString(),
                 AssemblyFileName = AssemblyFileName,
                 ConfigurationDateLastModified = ConfigurationDateLastModified,
@@ -310,13 +309,6 @@ namespace MediaBrowser.Common.Plugins
                 ConfigurationFileName = ConfigurationFileName
             };
 
-            var uiPlugin = this as IUIPlugin;
-
-            if (uiPlugin != null)
-            {
-                info.MinimumRequiredUIVersion = uiPlugin.MinimumRequiredUIVersion.ToString();
-            }
-
             return info;
         }
 

MediaBrowser.Common/Plugins/IUIPlugin.cs

@@ -1,16 +0,0 @@
-using System;
-
-namespace MediaBrowser.Common.Plugins
-{
-    /// <summary>
-    /// Interface IUIPlugin
-    /// </summary>
-    public interface IUIPlugin : IPlugin
-    {
-        /// <summary>
-        /// Gets the minimum required UI version.
-        /// </summary>
-        /// <value>The minimum required UI version.</value>
-        Version MinimumRequiredUIVersion { get; }
-    }
-}