Use human readable expressions instead of cron gibberish

https://github.com/floraison/fugit#fugitnat

lib/tasks/jobs.rake

@@ -5,4 +5,11 @@ namespace :jobs do
     Dir.glob(glob).each { |f| require f }
     CronJob.subclasses.each(&:schedule)
   end
+
+  desc 'Display schedule for all cron jobs'
+  task display_schedule: :environment do
+    glob = Rails.root.join('app', 'jobs', '**', '*_job.rb')
+    Dir.glob(glob).each { |f| require f }
+    CronJob.subclasses.each(&:display_schedule)
+  end
 end