Mongrel users - Feb 2006 - A quick refactoring for handlers and CGI

Luis,

The mongrel.rb file is starting to get a bit too big so I''m going to
refactor it out a bit.  I''m going to create a lib/mongrel/cgi.rb file
for
the CGI specific stuff and a lib/mongrel/handlers.rb file for the various
handlers we''ll be making.

Let me know if this causes you any pain.

Zed A. Shaw