ANN: New configuration module released

[Neal D. Becker]

Looks good so far.

The boost c++ library (about to be released) has a new program_options
parser.  One feature I appreciate in the design, is that the source of
options is seperated from the rest of the design.  This means that, out of
the box, it reads options from command line, from config files, and from
env variables.  Probably not hard to extend if anyone could think of a
reason.

I believe a decent config module should at least handle both config files
and command line options.  ENV variables are a nice touch too.