catchClientError deal with 404; add show_log, debug to Task; add cost to Bcs; add cache to Bcs.show_log,show_result,show_job_message;
catchClientError deal with 404; add show_log, debug to Task; add cost to Bcs; add cache to Bcs.show_log,show_result,show_job_message;

gahoo/SNAP,gahoo/SNAP,gahoo/SNAP