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.
Merge branch 'master' into schedule_dev

* master:
  Fixing overcommit_memory allocation error for new redis machines.