Add a advanced example

It uses its own API which I packed between MTApi5 and MatLab.
Possible that this is useless, but errors from the .NET assembly are more tradable.

Examples/MatLab/AdvancedExample/logging4matlab/+logging/getLogger.m

@@ -0,0 +1,28 @@
+function [obj, deleteLogger] = getLogger(name, varargin)
+  persistent loggers;
+  logger_found = false;
+  if ~isempty(loggers)
+    for logger = loggers
+      if strcmp(logger.name, name)
+        obj = logger;
+        logger_found = true;
+        break;
+      end
+    end
+  end
+  if ~logger_found
+    obj = logging.logging(name, varargin{:});
+    loggers = [loggers, obj];
+  end
+  
+  deleteLogger = @() deleteLogInstance();
+  
+  function deleteLogInstance() 
+      if ~logger_found
+          error(['logger for file [ ' name ' ] not found'])
+      end
+      loggers = loggers(loggers ~= obj);
+      delete(obj);
+      clear('obj');
+  end
+end