Document the new command running commands in the manual
Tweaks
Javascript: Lex const as a keyword
Slight adjustments of the manual for running commands
Update site layout

- Feature latest news on the front page
- Rework nav bar to be a little bit more smooth on the eyes
Improve language on index page
Rename  to
Rename  to
Use protocol independent urls for google fonts
First draft of the new interactions system

work-in-progress
Second draft of the new interactions system
Implement new replace-* commands
bugfix replacement
Move stack handling to command_line