03 Jun 1202 (03 Jun 2018):  Added a \par at the close of the
colophon environment.  Otherwise you need a blank line or
\par in there manually, which seems silly.  Also ironed out
some inconsistencies in license version (1.3 v. 1.3c), and
updated the copyright year.  v1.1.

13 Apr 1202 (15 Apr 2018):  Initial release.
