* Add alternate rendering support for OF labels when CG is not present
(the original updateOFPickerLabels, written in perl, used
banner(1) output.)
* Use consistent error numbers and a function to map err->string
* More/better/simpler examples in man page?
* support bless -info -device. Paths would be of the form
finderinfo[0] => disk0s9:/System/Library/CoreServices
use MK
* Add real error ranges
* Be defensive about validating arguments