Add summary to the end of the workflow

src/jflow/workflow.py

@@ -837,6 +837,12 @@ class Workflow(threading.Thread):
         Return the workflow description, has to be implemented by subclasses
         """
         raise NotImplementedError( "Workflow.get_description() must be implemented in " + self.__class__.__name__ )
+
+    def get_summary(self):
+        """
+        Return a workflow summary, if implemented by subclasses
+        """
+        return ""
     
     def define_parameters(self, function="process"):
         """ 
@@ -931,6 +937,8 @@ class Workflow(threading.Thread):
                     print("###########")
                     print("")
                     self.print_workflow_outputs(False)
+                    print("")
+                    print(self.get_summary())
                 except:
                     self._postprocess_status = self.STATUS_FAILED
                     raise