Move entire 2010 Mercurial version to .bak/10v05-hg-build.

We will rewrite this project in README.md for the front page,
and convert it to index.html for http://rsvp.github.com .
Add the very first draft of README.md dated 2014-10-20.

Now something on the github front page will appear.
Add new index.html converted from README.md using retext.

index.html presumably will appear under http://rsvp.github.com
maybe even github.io