Revision 313

- ContentGenerator.pm is now officially the superclass to all modules called
  by the dispatcher to generate content.
- Authen.pm now has a single point of exit, which makes it easier to read,
  debug, and modify
- Login.pm is now a subclass of ContentGenerator, and apart from the HTML,
  is in it's final form.
- All code has been commented up
- The authentication wrapper is now a working demonstration.  Anyone could
  stick it on a webserver and try it out.  The database code isn't written,
  so it authenticates against hardcoded strings (username: dennis,
  passwd: helloworld), but this at least proves that the system is workable.

--Dennis