Reduce the profile summary wording, so it fixes better on 80 characters
Add a message to the clean command in the Demo
Flesh out the --demo mode completely
Drop the .bat in the demo on Windows, looks ugly
Update the Demo file to have an output of --demo
Make the getting started section rely on --demo
Make Barrier work with multiple signals, although it's ambiguous which will fire
Make sure the progress thread gets killed, then you wait (at most 1s) for it
More refinements on the website