* dependency injection for the kafka consumers/producers
* Optionally use naffka in the monolithic server
* remember to call setupKafka()
* tweak imports
* fix integration tests
* Add use_naffka to the example config
* Update comment on the listen APIs
* Profile retrieval
* Saving avatar (without propagating it)
* Saving display name (without propagating it)
* Getters for display name and avatar URL
* Doc'd
* Introduced new Kafka topic and producer
* Updated config with new kafka topic
* Switched to samara producer and now sending messages
* Doc'd
* Put kafka update after the database insert
* Doc'd profileUpdate structure
* Removed unused parameter
* Moved user updates producer to clientapi/producers
