Converted logging to use log4net.

Changed LogBase to ConsoleBase, which handles console I/O.
This is mostly an in-place conversion, so lots of refactoring can still be done.

OpenSim/Framework/MessageServerConfig.cs

@@ -28,6 +28,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using OpenSim.Framework.Console;
 
 namespace OpenSim.Framework
 {