comments, or bug reports: thanks to all of you!
Significant bug fixes were provided by Cécile Ané, James Bullard,
-Éric Durand, Olivier François, Bret Larget, Nick Matzke,
+Éric Durand, Olivier François, Rich FitzJohn Bret Larget, Nick Matzke,
Elizabeth Purdom, Dan Rabosky, Klaus Schliep, Li-San Wang, Yan Wong,
and Peter Wragg. Contact me if I forgot someone.