[MESSAGING] added sqs functionality to main app
[MESSAGING] added sqs functionality to main app

- Not the final version although at this state it works end to end.
- I need to add logging to the messaging client.
- clean up the way it's used in the main app. This I would like to
  do now, but it's pretty dependent on the changes I'm making to
  the request verification, so it will wait until I get that done.

latrokles/ratatoskr