* Federation: Implement Query Profile API

Implements the server portion of: `GET
/_matrix/federation/v1/query/profile?user_id=...&field=...`

Closes #278
Signed-off-by: NAndrew (anoa) <anoa@openmailbox.org>

* Properly export profile-related structs and fix wording
Signed-off-by: NAndrew (anoa) <anoa@openmailbox.org>

* Check provided user's domain matches our own.

* Clean roomserver consumer

* Make account data sync incremental

* Use a different name for the sync AD table

* Improved error logging

* Created missing topic in tests

* Add client API topic to tests

* Add client API topic to common

* Move data batch retrieval

* Add database index for data retrieval

* Fix typo in table name

* Fix indentation

* 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

* Remove unused import

* Applied requested changes

* Added auth on PUT /profile/{userID}/...

* Improved error handling/reporting

* Using utils log reporting

* Removed useless checks