WIP on batches
Merge branch 'master' into batch
Batch storage updates
Avoid db hit if there are no idle apps
Improve --help
WIP on handler wakeup
Update gemfile lock
Merge branch 'batch'

Conflicts:
	lib/rapns/daemon/app_runner.rb
	lib/rapns/daemon/delivery_handler.rb
	spec/unit/daemon/apns/app_runner_spec.rb
	spec/unit/daemon/apns/delivery_handler_spec.rb
	spec/unit/daemon/apns/delivery_spec.rb
	spec/unit/daemon/app_runner_shared.rb
	spec/unit/daemon/app_runner_spec.rb
	spec/unit/daemon/delivery_queue_spec.rb
	spec/unit/daemon/gcm/app_runner_spec.rb
	spec/unit/daemon/gcm/delivery_handler_spec.rb
	spec/unit/daemon/gcm/delivery_spec.rb
Add DeliveryHandlerCollection to encapsulate handler stop logic.