* Saving memberships
* Removed unused index
* Removed useless log
* Fixed membership not being saved on the right conditions + added membership removal
* Updated outdated comment
* Use server lib method + check server name + use new roomserver API
* Better handling of events from the room server
* Fixed membership removal
* Corrected indentation
* Fix tests (hopefully)
* Replace broken kafka mirror
* Apply requested changes on database management
* Remove useless check and function
* Moved memberships update to the database package
* Use new common function
* Remove useless function
* Add integration tests for roomserver to travis
* Try setting the dist trusty to see if that helps with postgres
* Pretty print the test input JSON
* Add comment as to why we are using trusty
