Add install generator

lib/generators/periodicity/install/install_generator.rb

@@ -0,0 +1,12 @@
+module Periodicity
+  module Generators
+    class InstallGenerator < ::Rails::Generators::Base
+      desc "Installs periodicity and generates the necessary configuration files"
+      source_root File.expand_path("../templates", __FILE__)
+
+      def copy_config
+        template 'periodicity.rb.erb', 'config/initializers/periodicity.rb'
+      end
+    end
+  end
+end