0.8.4:
  - void anchor width optimization when we have a custom formatter (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221130)
  - make "{[:/18}" do the right thing (also allows "{[:/%s}", wide ? 40 : 10)
  - Can't skip anchor formatting in non-display styles
  - add test case for {[:/18}
  - add upload-xohtml-files to 'make upload'
0.8.3:
  - xohtml: Add "-w" option to pull support files from gh_pages
  - Add "upload-xohtml-files" target to publish support files in gh_pages/
  - add HISTORY/AUTHORS section to man pages
0.8.2:
  - xohtml: Add div.units as standard CSS text
  - Don't treat values as format strings; they are not
  - add "-p" to "mkdir -p build" in setup.sh
  - add test case for {U:%%} (from df.c)
  - detect end-of-string in '%' and '' escaping
  - make xo_simple_field, for common simple cases
  - xohtml: nuke "n" in "echo" commands
  - rename "format" to "fmt" for consistency; same for "str" to "value"