The base template now has access to the fund-raising goal that will be
displayed site-wide. The view here must provide it in the context for
access everywhere.
Furthermore, we need a local context processor to make sure it's in
context everywhere, and we have to make sure that context is properly
passed along.
This code is a bit cargo-culted in, based on what I read in various
places about adding the Request context.
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.
