Decouple scraper from v1 API

[bepetersn]

This is a multi-part task. The first part is to pull the ng_scraper command out of django's management (done with #343) and to modify the scraper to archive the results of a scrape (see #432).

The scraper will no longer need to deal with "discharging" inmates. To the extent this still needs to be done, it will be handled by client APIs (see #419). Some amount of work still needs to be done in extracting the old database-related functionality from the scraper (see future issue).

[bepetersn]

#343 is done.

[bepetersn]

It would be best to get #406 and also #419 done on the v2 branch before any of these other issues are deployed to the server. However, work can now continue on the master branch on these remaining modifications to the scraper.

As soon as it does, we will be in the midst of merging v1 and v2!!!! @wilbertom

[wilbertom]

Check out the new repository. Almost working. We should migrate scraper issues over to that repository.