Documentation

This addresses issue https://github.com/Mischback/django-oweb/issues/21
Trying to make this work
Sphinx ready to go!
module oweb.admin
module oweb.libs.costs
Use sphinx-apidoc to do the boring work
module oweb.libs.production

Completed the translation of existing documentation. There are some points, where
some more effort could be suitable, i.e. linking to the corresponding models.
module oweb.libs.queue
Merge branch 'doc' into development

This is related to issue https://github.com/Mischback/django-oweb/issues/21, but it is **not** solved.
Fucking documentation.