Change SQLiteNG to work with mono 2.6 and above using the Mono.Data.Sqlite.dll

Include the library so that Windows builds correctly
It appears that Windows is okay with either SQLite or SQLiteNG
Incorporate the latest fixes made by Diva to OpenSim.Data.SQLite

OpenSim/Data/SQLiteNG/SQLiteXInventoryData.cs

@@ -29,7 +29,7 @@ using System;
 using System.Data;
 using System.Reflection;
 using System.Collections.Generic;
-using Mono.Data.SqliteClient;
+using Mono.Data.Sqlite;
 using log4net;
 using OpenMetaverse;
 using OpenSim.Framework;
@@ -147,7 +147,7 @@ namespace OpenSim.Data.SQLite
             }
 
             reader.Close();
-            CloseCommand(cmd);
+            //CloseCommand(cmd);
 
             return perms;
         }