Working on issue https://github.com/Mischback/django-oweb/issues/28
Created custom middleware

Applying exceptions to views (wip)
More exceptions
more exceptions
Make our own version of get_object_or_404 and get_list_or_404
Make our own shortcuts work
Apply our shortcuts
fixed import
Apply exceptions in views/account.py
Apply exceptions in views/planet.py
Apply exceptions in views/tools.py
Apply exceptions to views/updates.py
forgot something

Ok, the right Exceptions are raise, but not yet imported
Fixed imports
Fixed copy/paste error
First version of the middleware with custom 404.html template
Merge branch 'issue28' into development

Fixed https://github.com/Mischback/django-oweb/issues/28

The 404.html template will need some love, but hey...