Staging job now gets moved to background so that
it does not get killed if it takes longer
than the Apache timeout.
Added AJAX monitoring of job status.
Signed-off-by: Joshua Ferraro <jmf@liblime.com>
* Added C4::BackgroundJob to monitor tracking of
background jobs
* start modifying stage-marc-import to use it
Signed-off-by: Joshua Ferraro <jmf@liblime.com>