Remove yml.example.
Notify user if message content is not a string.
Put a default id (needed).
Rename gate to deviceGate.
Remove unused variable.
Fix typo.
Add missing PUNK drop.
Remove security when encore payload payload.
Now process correclty inject of message/track with a forked thread.
Force integer of add key.
Add flush data of a track.
Alter comment.
Prevent TestsHelper#push_to_test_gate from raising exceptions.
Improve TestsHelper#push_to_test_gate error reporting.

This method will no longer raise any exception (will print
warning in the logs instead).
Sync fixes from ragent.
Merge remote-tracking branch 'origin/topic/bf_fix_tests_helper' into develop

* origin/topic/bf_fix_tests_helper:
  Improve TestsHelper#push_to_test_gate error reporting.
  Prevent TestsHelper#push_to_test_gate from raising exceptions.
Alter debug level.
Remove todo.
Alter doc.
Release version v0.2.4-rc106.