Make one-to-one rule an underride otherwise bings don't work in one-to-one wrooms. Likewise a couple of other rules.

Remove users from the remote_offline_serials list (and clean up empty elements) when they go online again

Store a list of the presence serial number at which remote users went offline, so that when we delete them from the cachemap, we can still synthesize OFFLINE events for them (SYN-261)

Sanitise a user's powerlevel to an int() before numerical comparison, because otherwise Python is "helpful" with it (SYN-351)

Unify http wrappers

SYN-350: Don't ratelimit the events generated during create room

Hotfixes v0.8.1-r4

Have TypingNotificationEventSource.get_new_events_for_user() return a deferred, for consistency and extensibility

Neater implementation of membership change auth checks, ensuring we can't forget to check if the calling user is a member of the room

Update syutil version to 0.0.4

Move server key api into rest/key/v1