Improve error handling in SMTP notify (handle empty template)
Follow change in Connector, replace get_meta by exists

Bumps the required connector version to 1.08
Also replaces manual get_list/get switches by get_scalar_as_list
Add FakeValidity Connector to MANIFEST
Sort workflow history on update/serial, see also #112

Sort on update and serial to circumvent jumping serials on
oracle cluster, siwtch to use database for sorting (not perl)