* 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
* Rough first pass at adding room version abstractions
* Define newer room versions
* Update room version metadata
* Fix roomserver/versions
* Try to fix whitespace in roomsSchema
* Fall back to postgres when parsing the database connection string for a URI schema fails
* Fix behaviour so that it really tries postgres when URL parsing fails and it complains about unknown schema if it succeeds
