It's a little confusing having both a "supporter" and "supporters" app. This is
a fairly minor change to move the sustainer banner urls/views into the existing
"supporters" app. The functionality isn't directly related, but it is all about
sustainers.
Each Cast (episode) can belong to one or more Podcast, allowing episodes to be
shared between podcasts. This enables us introductory episodes to be delivered
in their own feed, but also included in the main "The Corresponding Source"
feed.
This required adding an additional `podcast_slug` argument to most views. The
date archive views were dropped because they're not linked to from anywhere.
Added a `podcasts` view as an index of all available Podcasts.
This change removes the unused `ContactEntry` model and the `subscribe` view and
replaces it with an `Unsubscription` model and an `unsubscribe` view. It works
similarly, but is intended to be used with the `list-unsubscribe` and
`list-unsubscribe-post` headers.
Having Python code in "conservancy/static" is a bit suprising to people familiar
with Django. The name "static" is usually reserved for assets like CSS, JS and
images.
I'm moving `conservancy/static/views.py` to `conservancy/views.py` and removing
`conservancy/static/__init__.py`.
