add support for jobs to have their own custom public static function help() that can return helpful text on a per-job basis.
add support for jobs to have their own custom public static function help()
that can return helpful text on a per-job basis.

jbourassa/Cake-Resque,mfn/Cake-Resque,kamisama/Cake-Resque,voycey/Cake-Resque,manierim/Cake-Resque,wa0x6e/Cake-Resque,kamisama/Cake-Resque,jbourassa/Cake-Resque,manierim/Cake-Resque,wa0x6e/Cake-Resque,voycey/Cake-Resque,mfn/Cake-Resque