- continuing with the #31
adding abstract method to update job's log from MX ActionHandler
- closing on the #31
- simplifying the pipelines by introducing insert_and_publish_uow function
- slight re-phrasing
- allowing a uow-aware worker to update uow state to STATE_CANCELED
- incrementing version to 1.6
- updating GC UT
- updating UT to reflect shallow_update and unified insert_and_publish_uow
- import optimization
- replacing getattr with hasattr withing the Flopsy __del__ related methods
- removing extra verbosity during Job state transfer
- improving logging for StatusBusListener
- unifying logger call to "warning"
- further work on the StatusBusListener and shallow_state_update
- propagating MX skip and reprocess messages to the Job's log
 - simplifying Timetable.add_log_entry
 - simplifying several pipeline methods
 - minor MX NPE fixes
 - bugfix: job_record instead of job_record.timeperiod