Update to use health-data-standards:master

Updates dependency on health-data-standards to use `master`, rather than `bonnie-master`.

Requisite updates:
- `rails 4.1.2`
- `minitest ~> 5.3`
- `minitest-reporters` (to deal with `turn` not supporting minitest v5)

The major changes are around updating `test_helper.rb` to work under `rails 4.1.2`, and restructuring the javascript in `app/views/layouts/application.html.erb` to work under the constraints of `rails 4.1.2`'s updated forgery protection code.