This encapsulates more in the id and section handling code. Fixes a few
edge cases and separates implementation of the new and old section
handling code. Always normalizes and truncates generated ids in quickbook
1.6.
[SVN r75251]
- More consistent names.
- Not using `.` in basename.
- Run the quickbook manual test last (as when there's an error, the more
specific tests are more informative).
- Combine some of the code tests.
[SVN r75235]
