Delete unneeded auto-generated Rails files in `/app`, `/script`, and `/spec/dummy` dirs, and cleanup `/spec/dummy` code.
Use `mattr_accessor` to reduce code in `configuration.rb` (no change to function)
Convert `routes.rb` from `Rails.application.routes.draw` to `OkComputer::Engine.routes.draw`. The engine is now automatically mounted via prepend at `/okcomputer`, and you can change this via a new `OkComputer.mount_at` option. As part of this, I've added namespaced  `OkComputerController` as `OKComputer::OkComputerController`.
Merge the functionality of https://github.com/sportngin/okcomputer-newrelic-ignore into the `OkComputer::Engine` initializer. There's no practical case where a NewRelic user would want NewRelic to count OkComputer.
Get rid of all deprecation warnings in specs
Add test case for Delayed::Job#size using mocks