Jnf/prepare for release

This adds the changes to the blinder app discussed in the scrc planning meeting on 3/6. Included is:

* Deactivating routes for the review controller. We won't add them back until the auth layer is in place.
* Adds `required` to the `Question` model/table, plus default values to the seed file.
* Adds a required class to required fields on the proposal form
* Adds validations to the `Proposal` and `Response` models to respect required fields.