WARNING: massive refactor to follow libomv's latest changes regarding inventory folders. The newest version of libomv itself is committed here. Basically, everything that was using the AssetType enum has been combed through; many of those uses were changed to the new FolderType enum.

This means that from now on, [new] root folders have code 8 (FolderType.Root), as the viewers expect, as opposed to 9, which was what we had been doing. Normal folders are as they were, -1. Also now sending folder code 100 for Suitcase folders to viewers, with no filter.
All tests pass, but fingers crossed!

OpenSim/Framework/InventoryFolderBase.cs

@@ -34,6 +34,9 @@ namespace OpenSim.Framework
     /// </summary>
     public class InventoryFolderBase : InventoryNodeBase
     {
+        public static readonly string ROOT_FOLDER_NAME = "My Inventory";
+        public static readonly string SUITCASE_FOLDER_NAME = "My Suitcase";
+
         /// <summary>
         /// The folder this folder is contained in
         /// </summary>