* Sanity check in DeserializeLLSDXml() to return an empty LLSD block instead of throwing an exception

* Removing redundant code from OpenMetaverse.Utilities
* Using System.Diagnostics.StopWatch instead of Environment.TickCount for rate limiting, and speeding up packet sending from 75ms gaps to 10ms (might be slightly too fast, but it works for me)
* Cleaning up the logic a big in RequestAllSimParcels()
* Try/catch block in GridProxy around packet delegates

git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@2371 52acb1d6-8a22-11de-b505-999d5b087335

OpenMetaverse.StructuredData/LLSD/XmlLLSD.cs

@@ -71,13 +71,20 @@ namespace OpenMetaverse.StructuredData
         /// <returns></returns>
         public static OSD DeserializeLLSDXml(XmlTextReader xmlData)
         {
-            xmlData.Read();
-            SkipWhitespace(xmlData);
+            try
+            {
+                xmlData.Read();
+                SkipWhitespace(xmlData);
 
-            xmlData.Read();
-            OSD ret = ParseLLSDXmlElement(xmlData);
+                xmlData.Read();
+                OSD ret = ParseLLSDXmlElement(xmlData);
 
-            return ret;
+                return ret;
+            }
+            catch
+            {
+                return new OSD();
+            }
         }
 
         /// <summary>