Contributing to collapse

Please file an issue or feature request ideally using the templates.
For broader proposals start a discussion.
To contribute directly, fork the entire repo (including the 'development' branch), make your changes in the 'development' branch, and send a PR to the 'development' branch.
I'll mention contributors in the DESCRIPTION file as "ctb" if the contribution is substantial, i.e., doesn't amount to a bug fix but new functionality.