Next step: pass to data-attributes.
Bug: empty exptime input sometimes.
Regression: ctrl+c on web server doesn't trigger sequencer's KeyboardInterrupt anymore.

Webcam has a couple of presets to look up for lazy people.
Unique form for radec and simbad query.
Now ready for live status.

Observation template now appends filenames.
Stop will have to stop the template and not the bare camera.
Validated HTML.