#21 command line help inconsistent with options

[Steve Blackburn]

The help offered at the command line is incomplete and possibly inconcisstent.

The short term fix is just to make it correct.

The better fix is to recode the command line parser so that options, their short forms, and their descriptions are kept in a table, and the command line parser and the help system both operate via this table, so they're always in synch.

[Steve Blackburn]

I have implemented the short term fix. So things are consistent. We still need to fix it properly.

[John N Zigman]

Now using apache commons cli parser for command line parsing.