- Added feature #481, allowing for user control of the color rule order
of precedence via the 'rule.precedence.color' configuration variable.
- Color rules now obey the rc.search.case.sensitive configuration option.
- The color.keyword.XXX color rule now applies to annotations too.
- All tests (I hope) now properly remove completed.data on exit, which
should prevent certain non-deterministic tinderbox results caused by
residual data.
- Added unit tests for all auto coloration configuration settings.
- Tweaked colorization rule precedence to allow color.due to override
the built-in coloration of due tasks.
