Edits Application config to insert Rack::CORS before Warden
First step into moving to a base Rails stack.
Edits CustomersController #index and #show views.
Edits Payments#show view to be common rails stack.
Edits SalesController#show to be managed by Rails.
Edits after_sign_in_path to route to CustomersController#index.
Adds ability to create Payment for Customer.
Ability to edit Customer from CustomersController#show page.
Ability to create Sales for Customer.: