again a next step: - approvement of cache handling - remove old code
again a next step:
- approvement of cache handling
- remove old code

git-svn-id: 9a050473c2aca1e14f53d73349e19b938c2cf203@11739 6a7f98fc-eeb0-4dc1-a6e2-c2c589a08aa6

legoktm/pywikipedia-rewrite