added debug output to gearman lib
allow WORK_FAIL to come back with an error
bubble error text up to the Job owner
removing body from debug output since it breaks logstash (due to higher order characters) and does not really offer much for overall debugging
stop sending error strings with WORK_FAIL.  emit error from job-abort regardless of whether an error string is set
do not send 'job aborted' message when clearing jobs
report error properly in cases where no error string is given
turning off gearman debugging