fix portable and 3.5 project references

MediaBrowser.Model/Session/ClientCapabilities.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace MediaBrowser.Model.Session
+{
+    public class ClientCapabilities
+    {
+        public List<string> PlayableMediaTypes { get; set; }
+        public List<string> SupportedCommands { get; set; }
+
+        public ClientCapabilities()
+        {
+            PlayableMediaTypes = new List<string>();
+            SupportedCommands = new List<string>();
+        }
+    }
+}