Updated to the raumzeitlabor status proxy to specs v.013
Made the schedule field required if the cache field is present.
New cron created when a space is added and cron rescheduled on cache update.

  utils.php:  new function get_space_cron_schedule()
              reads the cache/schedule field from the cached json
  update-cache.php:  reschedules a cron after a space has been newly cached
  add-hackerspace.php:  create cron when adding a space
  CacheReport.class.php:  comment added