* Add prefixes to namespace the SQL tables.

This means that multiple components can share a single database schema
without colliding with each other.

Once this lands it will be possible to run a single monolithic dendrite
against a single postgresql schema.

Hopefully this will make trivial deployments and development easier.

* Comment

* 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

* Save function for account data

* Fix upsert + add empty routes and function

* Save account data

* Retrieval functions

* Implement retrieval in /sync

* Fix arrays not correctly initialised

* Merge account data retrieval functions

* Request DB only once per request

* Initialise array

* Fix comment

* 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

* Saving memberships

* Removed unused index

* Removed useless log

* Fixed membership not being saved on the right conditions + added membership removal

* Updated outdated comment

* Use server lib method + check server name + use new roomserver API

* Better handling of events from the room server

* Fixed membership removal

* Corrected indentation

* Fix tests (hopefully)

* Replace broken kafka mirror

* Apply requested changes on database management

* Remove useless check and function

* Moved memberships update to the database package

* Use new common function

* Remove useless function

* 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

- Renamed `clientapi/auth/types` to `clientapi/auth/authtypes` for the same
  horrible namespace clashing reasons as `storage`.
- Factored out `makeAPI` to `common`.
- Added in `makeAuthAPI`.

Previously, all database stuff was under the helpfully named
package 'storage'. However, this convention is used throughout all
of dendrite, which will clash the moment we want to add auth to all
the CS API endpoints. To prevent the package name clash, add
sub-directories which represent what is being stored so the final
usage ends up being:

```
func doThing(db *storage.SyncServerDatabase, authDB *accounts.Database)
{
    // ...
}
```

Including the ability to add new accounts with a user/password and
select accounts using a user/password. Uses bcrypt to hash passwords.