Compatibility with headless browser processing

[Jirka]

The dash model needs be compatible with the model provided by headless browser scripts.

Bachelor's thesis of Adriana:
How to run dashapp projects: https://github.com/Jirka/dash/wiki/Running-dashapp-projects
Multiple ssh keys: https://github.com/Jirka/dash/wiki/Multiple-ssh-keys

Use branch feature-11-phantom to make model changes: https://github.com/Jirka/dash/tree/feature-11-phantom