Thanks Dust - this is great :) will merge to develop and tweak it slightly there.

Added Documentation regarding ArchLinux

SYN-258: get_recent_events_for_room only accepts stream tokens, convert the topological token to a stream token before passing it to get_recent_events_for_room

Federation fixes.

Pass through list of room hosts from room alias query to federation so that it can retry against different room hosts

SYN-202: Log as WARN the 404 'Presence information not visible' errors instead of as ERROR since they were spamming the logs

Apply sanity to the transport client interface. Convert 'make_join' and 'send_join' to accept iterables of destinations

Change context.auth_events to what the auth_events would be bases on context.current_state, rather than based on the auth_events from the event.

Rearrange persist_event so that do all the queries that need to be done before returning early if we have already persisted that event.