* Update boilerplate with `bin/rake rails:upgrade`
* Use test instead of test:all rake task
* Change stylesheet extensions from .css.scss to .scss
* Update docs to use localhost instead of 0.0.0.0 because Rails 4.2
no longer listens on all addresses by default.
This new setting will allow us to control in `site.yml` whether or not
our static assets will be served by Rails or by the app server that is
proxying requests to Rails. This is set to `false` by default so that
the proxying server is responsible for serving the assets.
* Remove all methods implementing and checking for the old algorithm
* Document a pre-upgrade step to check for remaining obsolete passwords
* Remove config.salt
