add CronTab, Counter, NoSuchKey; better checkAll for Project; add poll, states, state_filter, retry, redo, update, debug to Project; dependence => depend_on, add depend_by to Task; fix Task Mounts by prepare_Mounts, prepare_MountEntry; fix bcs. instance Spot issue; better prepare_disk; redo should delete output files; add mark_state, update, update_dependence_chain to Task; fix dag and job init issue for Bcs; add deleted column to Bcs; add show_job_message to Bcs; add name to Instance.__repr__
add CronTab, Counter, NoSuchKey; better checkAll for Project; add poll, states, state_filter, retry, redo, update, debug to Project; dependence => depend_on, add depend_by to Task; fix Task Mounts by prepare_Mounts, prepare_MountEntry; fix bcs. instance Spot issue; better prepare_disk; redo should delete output files; add mark_state, update, update_dependence_chain to Task; fix dag and job init issue for Bcs; add deleted column to Bcs; add show_job_message to Bcs; add name to Instance.__repr__

gahoo/SNAP,gahoo/SNAP,gahoo/SNAP