Fixed SimpleApp - aka thankgoditssundaycommit

* Updated SimpleApp with various introduced dependencies
* Extracted ScenePrescence creation in Scene
* removed try-catchall from UserManagerBase (that actually hid a bug)
* Refactored RegionInfo
  * handle is calculated
  * it will explode upon accessing x,y,ip,port,externalip if not explicitly initialized
* Removed superfluous 'ref' keywords
* Removed a shitload of 'catch Exception e' that causes build warnings
* Lots of small refactorings, renames et c
* Ignored some bins

OpenSim/Framework/Data/UserProfileData.cs

@@ -136,7 +136,7 @@ namespace OpenSim.Framework.Data
         /// <summary>
         /// The IP address of the user
         /// </summary>
-        public string agentIP;
+        public string agentIP = String.Empty;
         /// <summary>
         /// The port of the user
         /// </summary>