PUMAS v1.2

PUMAS v1.1

PUMAS v1.0

Add a consistency check for the new stepping

Add a Travis build, coverage report and badges

Enable `straight` steps with geometries

Patch a bug for dummy interactions

Clean the recorder and add a callback for custom records

Migrate the API doc and the website to separate repositories

Patch the bias weight for using x = q / K fraction instead of nu = q / E