Add a start log message.
Add termination log messages.
Improve worker termination log message.
Refactor signal handlers.
Log uncaught exceptions.
Fix lint errors.
Purge commander stuff from options object.
Tweak error message.
Update history.
Bump version.
Update coverage report.
Merge branch 'master' of github.com:nature/boomcatch into svg-waterfall
Update package description.
Start calculating the customised SVG settings.