Complete rewrite of dataset class, with (all) the necessary updates

system/workflow.py

@@ -30,6 +30,9 @@ class Workflow:
                 print '        %s' % fun.name
 
     def add_project(self,project):
+        if project == None:
+            logger.log('notice','Proejct is empty')
+        logger.log('notice','Project added in : %s' %self.name)
         self.project = project
 
 class EmptyWorkflow(Workflow):