Merge pull request #206 from lance0428/master

Fix issue of 'marking read' or 'marking previous read' from feed story list not updating feed counts correctly
Adding node server to db firewall.
Marking as read covers both socialsubs and feeds.
Shift+a to mark as read for blurblogs.
Shift+a to mark as read for blurblogs.
Increasing logging on read social sub stories.
Fixing huge bug in mark_feed_read for socialsubs.
Parallelizing deploy commands.
Adding email for first share to tell users about their blurblog.
Adding random delay to realtime feed unread counts to prevent thundering herd.
Forcing earlier fetch if stats calc is less than scheduled fetch.
Complete rewrite of feed update schedule.
Use average stories per month in calc.
Correcting for premiums being counted twice.
Adding metric for last story date, used to calculate next scheduled update.
Fixing ulimit on new machines. Upgrading celery.
Merge branch 'master' into schedule

* master:
  Fixing ulimit on new machines. Upgrading celery.
Fixing overcommit_memory allocation error for new redis machines.
Merge branch 'schedule'

* schedule:
  Adding metric for last story date, used to calculate next scheduled update.
  Correcting for premiums being counted twice.
  Use average stories per month in calc.
  Complete rewrite of feed update schedule.
Upping to 5000 feeds per minute.