- The get_conversation_messages has been added to the API and the WS
with the conversation identifier (convid) instead of the userto,
to let get conversation messages and the members involved.
- The cache has been also reviewed, to use the convid instead of the
[userfrom, userto] keys.
- The get_most_recent_conversation_messages has been added to the API
to update the cache when needed.
- No longer use the Fibonacci sequence for delaying the timeout.
It is too aggressive.
- The backoff_timer AMD module now expects the callback AND the
backoff function to be passed to the constructor.
- Added ability to specify polling frequency in config.php.
- Added helper function to return the cache key.
- Reworded the parameters for clarity.
Andrew Nicols