Properly requeue not_enough_data_to_proseed. Fix doc_to_addr(undefinded)
Merge fixed amqp worker from mongodb_storage
Rename shift frequency to shift frame. Cleanup
Make 'Requeue' message to go in DEBUG level. It's an anticipated situation. Nothing special
Store earch shift to 'Shifts' array
Remove unused code
Separate k_storage to k_dynamic_storage and k_shifted_storage
Implement message status report using the Shifted storage