embedded URIs, although documented here:
http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html#embedded-uris
generate messages like this from rst2html --verbose:
quickstart.rst:3: (INFO/1) Duplicate explicit target name: "the tahoe-dev mailing list".
Also this patch prepends a "utf-8 BOM" to the beginning of the file.
Remove install.html (long since deprecated).
Also replace some obsolete references to install.html with references to quickstart.rst.
Fix some broken internal references within docs/historical/historical_known_issues.txt.
Thanks to Ravi Pinjala and Patrick McDonald.
refs #1227