Signed-off-by: NMTRNord <mtrnord1@gmail.com>

* Implement GET /rooms/{roomID}/state/{type}/{stateKey}

* Add comments

gb vendor update github.com/matrix-org/gomatrixserverlib
gb vendor update github.com/matrix-org/util

* Add config for setting up a jaeger opentracing reporter

* Remove redundant comment

* Add opentracing Spans to the HTTP APIs

* Add opentracing spans to the HTTP RPC clients

* Set the span in the request context

* More docstring

* Implement setting alias during room create

* Update the install instructions

To include some of the newer components.

* update INSTALL diagram

client_data goes to sync-api-server, not room-server.

* Implement shared secret registration

* Use HexString from gomatrixserverlib

* Correctly check username validility

* Move prev event structure to component-wide types

* Renamed key for better understandability

* Implement /state endpoint

* Change rowsToEvents() to return an empty slice instead of nil in case of empty result set

* Doc

* Fix forgotten comma

* Specify HTTP method

* Update comment

* Remove debug fmt.Println

The todo list hasn't been updated in six months; let's replace it with a more
useful link.

* Add table for storing invites in the syncapi

* Use the invite table to list the active invites for a user

* Update the invites table from the roomserver stream

* Include the invites table when determining the maxInviteID

* Add 'unused' lint

* Keep testdata consts