Don't show full status string for now...
Sort by priority, then status, then summary (alphabetically) in all list outputs
Set up Priority enum and start using it as basis for priority definitions; also implement PriorityValue class to allow priority comparisons...
Extend Priority enum and use it
make class attributes for priority sets and regex, and abandon old lookups. Also fixup listpri
Support commandline option -pA for setting priorities. Rename -p (for no-color) to -m (for monochrome)