Clean up of simulation version, the number that rules the compatibility of teleports:

- It's not configurable anymore, it's fixed in code. Each number means an increase in features of the teleport procedure
- Its definition moved to the global VersionInfo class
As of now it's still 0.3.

OpenSim/Framework/Servers/ServerBase.cs

@@ -873,7 +873,8 @@ namespace OpenSim.Framework.Servers
 
         protected string GetVersionText()
         {
-            return String.Format("Version: {0} (interface version {1})", m_version, VersionInfo.MajorInterfaceVersion);
+            return String.Format("Version: {0} (interface version {1}, SIMULATION/{2})", 
+                m_version, VersionInfo.MajorInterfaceVersion, VersionInfo.SimulationServiceVersion);
         }
 
         /// <summary>