Doomed transactions can be read-only.
Update elasticsearch in after commit hook.
Sigh, can't easily index currently changed objects faster than the listener.
More flexible logging for es-index-listener.
Make maximum poll interval configurable.
Merge pull request #65 from ENCODE-DCC/es-sync-tweaks-620

Es sync tweaks 620
Trim to actual script (had leading cruft from related script)
Merge branch 'master' into edwFile4