[RP] new argument parsing code committed

[Shawn Betts]

Hi Folks,

I just committed the new argument parsing code. Please update and tell
me if it breaks.

I did my best to preserve the functionality of the commands. I also
ran each command through some limited testing. If any commands don't
work as you expect them to and its a problem, please let me know.

NOTE! 'ratpoison -c' now prints errors to stdout and normal output to
stdin. It uses the first character of the output to determine if its
an error or not, similar to how interactive/non-interactive works. If
you notice a '0' or '1' at the beginning of the 'ratpoison -c' output,
it is an older version of ratpoison than is running.

-Shawn