Read the Docs: failure to display badges #106
Description
https://alchemtest.readthedocs.io/en/latest/ top level page includes verbatim error messages:
System Message: WARNING/2 (/home/docs/checkouts/readthedocs.org/user_builds/alchemtest/checkouts/latest/docs/index.rst, line 42)
Cannot scale image! Could not get size from "https://zenodo.org/badge/83470847.svg": Requires Python Imaging Library.
Perhaps we need to include PIL in requirements.txt?