* Add wiring for querying the roomserver for the default room version
* Try to implement /capabilities for room versions
* Update copyright notices
* Update sytests, add /capabilities endpoint into CS API
* Update sytest-whitelist
* Add GetDefaultRoomVersion
* Fix cases where state package was shadowed
* Fix version formatting
* Update Dockerfile to Go 1.13.6
* oh yes types I remember
* And fix the default too
Fix Docker files which had been forgotten in #594 and update scripts and docs to remove references to gb.
I also removed the `jenkins` directory which is outdated. We can revert f8d7e99 if we realise that it was a mistake to do so.
