Refactor. Make ConsoleBase a true base class. Create CommandConsole as a simple

console capable of processing commands. Create LocalConsole as a console
that uses cursor control and context help. Precursor to a distributed
console system for the new grid services. No functional change intended :)

OpenSim/Framework/Console/MainConsole.cs

@@ -29,9 +29,9 @@ namespace OpenSim.Framework.Console
 {
     public class MainConsole
     {
-        private static ConsoleBase instance;
+        private static CommandConsole instance;
 
-        public static ConsoleBase Instance
+        public static CommandConsole Instance
         {
             get { return instance; }
             set { instance = value; }