release activities for 0.5.0

Please include this note in the release notes.

Note: The signatures for all pre/post event handler methods (e.g. pre_data_obj_create) have been changed to include an *args parameter. This should be included in any existing event handler files by inserting the new parameter just before the **options keyword arguments, like so:

     @staticmethod
-    def post_data_obj_create(hdlr_mod, logger, session, meta, **options):
+    def post_data_obj_create(hdlr_mod, logger, session, meta, *args, **options):

irods / irods_capability_automated_ingest

release activities for 0.5.0 #238