* Implement membership endpoints
* Use FillBuilder when possible
* Fix typo in membership event content
* Fix state key invite membership events not being correctly set
* Set membership content to match the profile of the user in state_key
* Move event building and rename common function
* Doc getMembershipStateKey
* Check if user is local before lookin up their profile
* Use gomatrixserverlib function to split user ID
* Propagate profile update via m.room.member events
* Send profile data on room join
* Send profile data on room creation
* Rename variable
* Move membership update to roomserver consumer
* Improve iteration
* Move event update from client API server to sync API server
* Change the way buildMembershipEvents is called
* Forbid update of someone else's profile
* Use gomatrixserverlib method
* Fix depth and previous events not being set
* Fix wrong removal in latest commit
* Update all events instead of only memberships
* Handle case where there is no state key
* Fix test
* 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
