Added sphinx autodoc for email param.

chipathlon/workflow.py

@@ -44,6 +44,8 @@ class Workflow(object):
     :param save_db: Whether or not we want to save results to the database.
         True by default.
     :type save_db: bool
+    :param email: An email address to notify when the workflow is finished.
+    :type email: str
     :param rewrite: Whether or not to rewrite existing files.  If true, it will
         ignore files in Mongo and recreate them.  If false, it will download
         files based on the latest available completed job.