We're keeping 'events', in case we decide to add more keys later.

joined->join
invited->invite
archived->leave

Share sytest clone across runs

Depends on https://github.com/matrix-org/synapse/pull/380

Depends on https://github.com/matrix-org/synapse/pull/380

Only retry federation requests for a long time for background requests

SH CAS auth via homeserver

Merge pull request #380 from matrix-org/daniel/jenkins-sytest

Run sytests on jenkins

Output results files on jenkins

Outputs:
 * results.xml
 * coverage.xml
 * violations.flake8.log

Pull out jenkins script into a checked in script

Don't complain if /make_join response lacks 'prev_state' list (SYN-517)

Allow guests to /room/:room_id/{join,leave}