* 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

* Add errcheck linter

* Add config for 'fast' linters

* Fix errcheck lint stuff

* Fix errcheck lint

* Use a shared PostgreSQL sequence to generate ids.

Share an auto incrementing sequnce between the account data and
the room event table.
This means that account data updates can be received independantly of
room events updates.

This should give some basic support for fixing #212

* Remove redundant 'primary key'

* Re-number the SQL arguments

* Fewer lies in comments

* Use a read-only snapshot transaction for calculating sync responses

* gb vendor update github.com/lib/pq

* Make media repo use error rather than jsonErrorResponse

* Update comments

* gb vendor github.com/pkg/errors

* Fixup error formats

* Add contexts to device database

* Remove spurious whitespace

* Add contexts to the roomserver storage layer

* Fix rooms_table

* Append target profile to invite events created from a 3PID invite

* Don't redeclare err

* Add check on invited server

Hopefully will avoid spurious test failures like
https://travis-ci.org/matrix-org/dendrite/builds/272960127

* Specify HTTP methods for the client API

* Specify HTTP methods for the federation API

* Specify HTTP methods for the media API

* Specify HTTP methods for the sync API

* Add context.Context to the federation client

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

* Add comment

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

* Add handler for the exchange_third_party_invite endpoint

* Doc

* Use SendEvents to send the invite to the roomserver

* Add missing error check

* Add checks

Because it's easy to get confused between the two methods.

* Add config for trusted ID servers

* Add new error

* Implement check for trusted ID server

* Complete unfinished comment

* Make comment more explicit in the config file

* Use go standard errors in membership.go

* Use standard errors instead of JSON responses in threepid

* Doc errors

* Remove unused parameter

* Use federation to auth the event if the server isn't in the room

* Use MakeAPI for 3pid onbind handler as it isn't a standard federation request

* Error check

* Temporarily disable tests

* Fix return on 3PID invite

* Re-enable tests

* Remove useless else

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

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

* Implement same behaviour as synapse

* Fix condition and array initialisation

* Log errors on iteration and throw one if no server could be reached

* Fix err not being initialised

* Fix lint

* Fix import path

* Fix response to /invite to match the format expected by synapse

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

* Use gomatrixserverlib.RespInvite

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