Features
* Update README
* Add horus extract magic command
* Add horus discover magic command
* Fix language_info missing when notebooks starts
* Add horus lock magic command
* Adjust instantiation of horus magic commands and use feature for notification when to save content
* add horus show magic command
* Add horus requirements magic command
* Add check magic command
* Add nbextension entry points
* WIP: Introduce magic commands
* Add link to v0.9.2 video
* use thoth-advise manager instead of update manager
* :arrow_up: Automatic update of dependencies by Kebechet
Improvements
* Merge lock and intall/create kernel command for magic commands