administrators can now:
- Set displayname of users
- Update user avatars
- Search for users by user_id
- Browse all users in a paginated API
- Reset user passwords
- Deactivate users
Helpers for doing paginated queries has also been added to storage
Signed-off-by: Morteza Araby <morteza.araby@ericsson.com>
Removes device_id and ClientInfo
device_id is never actually written, and the matrix.org DB has no
non-null entries for it. Right now, it's just cluttering up code.
This doesn't remove the columns from the database, because that's
fiddly.
