require setuptools

...which makes buildout not complain
fix redirect handling when using 'expandtemplates'

the redirect handling has been broken as part of 'expandtemplates'
change. I.e. we do store the pages under their original non-redirected
name and therefor we can't look them up under their redirected name.

we now try both names, the original and the redirected one.

I'm not quite sure what goes wrong if I remove redirect handling
completely when fetching. So, I didn't do that.