cleanup of wikis and documentation

[Tom Breuel]

As you may have noticed, the ocropus.org link has changed and now
points to the Google Code site. The primary resources for OCRopus are
now just two sites:

=== Google Code ===

http://ocropus.org/ aka
http://code.google.com/p/ocropus/

Home page, source code, core documentation, links, issue tracker, etc.

=== Google Groups ===

http://groups.google.com/group/ocropus

Mailing list, discussion group, file repository, and user-edited
pages.

I hope this will make it a little easier for people to find up-to-date
information and to contribute.

Tom

PS: The Google Sites wiki was getting out of date, and it never got
the "allow anybody to edit this" option that we were waiting for.