Each custom section can now have their own associated custom SectionView.
SectionView subclasses behave just like Django's generic views, except they
return Section objects instead of http responses. The updated PageView takes
care of compositing all rendered sections into the final response. Nice!
Oh boy! This is a big one. Two new dependencies: swapper and
django-polymorphic will now allow any project that uses cms to elegantly
extend the default Section model with custom fields and custom subclasses.
This is still a work in progress.