0.005    2006-08-23
         this release brought to you by NUFFIN!
         allow subcommands (commands beneath commands)
         add a default "help" command
         support global options
         improve documentation and tutorial
         extensive minor refactorings and improvements

0.002    2006-06-14
         fix test plan

0.001    2006-06-12
         first release (not counting Rubric::CLI)