Improve formatting for user-manual html and pdf output

- Change asciidoc title level.
  This removes blank first page and "Part I" page
  (there is no "Part II"!) in pdf output
- Use style 'article' instead of 'book'.
  This removes sub-tocs and chapter numbering in html output
Remove "Notes and todo" section
Move glossary to end of user-manual
XXX Disable reconfiguration; create and ignore .mobi