Automatically Conflate a Rails App

QA Plan
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1. Add `gem 'conflate-rails', git: "git@github.com:sportngin/conflate-rails.git"` to a Rails app.
2. Run `bundle` to install and `rails console` to open the console.
3. Confirm that for every YAML file in config there is an entry in Rails.application.config (e.g., config/database.yml, verify that `Rails.application.config.database` contains its contents).