Initial JSON API setup
Install blacklight components because we'll wind up needing them anyhow.
Run blacklight migrations.
Remove unneeded blacklight initializer.
Disable unneeded routes.
Temporarily disable the layout directive.
Eliminate secret key assignment block in devise.rb; Devise is now smart enough to use config/initializers/secret_token.rb
Add Encrypted API Key field to users model.
JSON API work.