Fixed ScriptEngine config in OpenSim.ini.example that was out of place.

Added some info to failure on GridServices listening port so people can see what actually went wrong.
Moved most of the function/event execution module to a baseclass so other execution methods (instead of reflection) can be used with custom script modules run by ScriptEngine.Common.
+ some accumulated patches

OpenSim/Region/ScriptEngine/Common/IScript.cs

@@ -33,7 +33,7 @@ namespace OpenSim.Region.ScriptEngine.Common
     public interface IScript
     {
         string State { get; set; }
-        Executor Exec { get; }
+        ExecutorBase Exec { get; }
         string Source { get; set; }
         void Start(LSL_BuiltIn_Commands_Interface BuiltIn_Commands);
         EventQueueManager.Queue_llDetectParams_Struct llDetectParams { get; set; }