created Railtie to fix routing problem, fixes #15

lib/email_preview.rb

@@ -1,6 +1,7 @@
 require 'mail'
 require 'email_preview/engine'
 require 'email_preview/fixture'
+require 'email_preview/railtie' if defined?(Rails)
 
 module EmailPreview
   class << self

lib/email_preview/railtie.rb

@@ -0,0 +1,18 @@
+module EmailPreview
+  class Railtie < Rails::Railtie
+    initializer 'email_preview.prepend_routes' do
+      Rails.application.routes.prepend do
+        resources :email_preview, :controller => 'email_preview', :only => [:index, :show] do
+          collection do
+            get :navigation
+          end
+          member do
+            post :deliver
+            get :details
+            get :preview
+          end
+        end
+      end
+    end
+  end
+end