Django historically had two versions of the static() function, one for

very basic file references, and one that used the storage mechanism.

These came with their own import location and their own template tag

library.
Django 1.10 combined these into just a single static() method and a

single static template tag library. This change updates our code to

use the modern versions.

Unit tests pass on Django 1.11 and on 3.2 (with other in-progress changes).