The existing jQuery UI-based fundraising progress bar used a float layout,
making it hard to adapt for mobile use. Given that there is not interactivity,
I've dropped all the JS and switched to a flexbox layout. This works well
because the bar will stretch to fit the text rather than always maintaining its scale.
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.
