Added new api handlers to get plugin information

MediaBrowser.Model/Plugins/BasePluginConfiguration.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace MediaBrowser.Model.Plugins
+{
+    public class BasePluginConfiguration
+    {
+        public bool Enabled { get; set; }
+
+        [IgnoreDataMember]
+        public DateTime DateLastModified { get; set; }
+
+        public BasePluginConfiguration()
+        {
+            Enabled = true;
+        }
+    }
+}

MediaBrowser.Model/Plugins/PluginInfo.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace MediaBrowser.Model.Plugins
+{
+    /// <summary>
+    /// This is a serializable stub class that is used by the api to provide information about installed plugins.
+    /// </summary>
+    public class PluginInfo
+    {
+        public string Name { get; set; }
+        public string Path { get; set; }
+        public bool Enabled { get; set; }
+        public bool DownloadToUI { get; set; }
+        public DateTime ConfigurationDateLastModified { get; set; }
+        public Version Version { get; set; }
+    }
+}