drafts of assorted modules, just for backup

All are still works in progress. Drug design in parallel has been split
into pages; several versions of the epidemic are coming along, and
documentation for authors needs to be reviewed, preferably by someone
trying to write a module.
html versions of dev docs for Doug

because his computer is too old to run a github client.
assorted updates

bear with me as I try to learn how to use command-line git.
Merge branch 'try-kinge'