* Changed wording: element is one element on the projector. A slide is a functoin to render one element
* Use AllData as first argument all the time
* Render username on server
* Add exceptions for erros on projector
* Fix motion recommendation
* Only show state extension, if it is allowed by the state
* Add motion_change_recommendations to motion full_data
* geis does not work with channels2 and never will be (it has to be python now)
* pytest
* rewrote cache system
* use username instead of pk for admin user in tests
