introduced type concept into workflow

lib/WebGUI/Workflow/Activity.pm

@@ -168,6 +168,19 @@ sub getName {
 	return "Unnamed";
 }
 
+#-------------------------------------------------------------------
+
+=head2 getType ( )
+
+Returns the type of workflow that this activity may be used in. Unless this method is overriden, the type is "none". This is a class method.
+
+=cut
+
+sub getType {
+	return "none";
+}
+
+
 #-------------------------------------------------------------------
 
 =head2 new ( session, activityId )