Editable files

[Deleplace]

Current behavior

• <source-code> files are read from filesystem
• they are read-only
• demos may be using the same files (e.g. running the displayed code)

Desired behavior

• <source-code> files are optionally editable in the browser
• on change, they are persisted to disk
• the presenter may run the demo, then edit the file, then run again the demo on modified source