Added empty lists as default values for all_data and all_plots in Options, so

that subclasses of Options will work with the GUI without modifications.

fluents/workflow.py

@@ -243,6 +243,8 @@ class Options(dict):
         dict.__init__(self, *args, **kw)
         self['out_plots'] = None
         self['out_data'] = None
+	self['all_plots'] = []
+	self['all_data'] = []
 
     def _copy_from_list(self, key_list):
         """Returns suboptions (dictionary) from a list of keys.