Add dummy app, rspec helper files, and routing tests

spec/dummy/config/application.rb

@@ -0,0 +1,18 @@
+require_relative 'boot'
+
+require 'rails/all'
+
+Bundler.require(*Rails.groups)
+require "calligraphy"
+
+module Dummy
+  class Application < Rails::Application
+    # Initialize configuration defaults for originally generated Rails version.
+    config.load_defaults 5.1
+
+    # Settings in config/environments/* take precedence over those specified here.
+    # Application configuration should go into files in config/initializers
+    # -- all .rb files in that directory are automatically loaded.
+  end
+end
+