The urls setup of old gave us various arguments at call time for
custom_index(), and some where useful. Hopefully, listing() can support
the same type of system, over time, once adapted. Here's an attempt to
get it started, first by supporting paginate_by.
I don't believe custom_index() should be used anymore given that we have
this new listing setup. At least, that's what I surmise based on
current error messages. I may bring this back if removing it breaks
something else.
Hitherto the supporters list has been committed directly to the static
sponsors/index.html file. This was never ideal and a quick hack to
build Conservancy's supporters list at the beginning of the supporters
program.
With this change, a Django app now exists that dynamically generates the
supporters list.
The database rows must be built from Conservancy's internal Ledger file,
which will be done in a separate script.
