Support multiple swagger documents. Add custom_ui_generator. Update readme

app/controllers/swagger_rails/application_controller.rb

@@ -1,4 +1,8 @@
 module SwaggerRails
   class ApplicationController < ActionController::Base
+
+    def redirect_to_swagger_ui
+      redirect_to swagger_ui_path
+    end
   end
 end

app/controllers/swagger_rails/swagger_ui_controller.rb

@@ -2,6 +2,12 @@ module SwaggerRails
   class SwaggerUiController < ApplicationController
 
     def index
+      @discovery_paths = Hash[
+        SwaggerRails.swagger_docs.map do |name, path|
+          [ name, "#{root_path}#{path}" ]
+        end
+      ]
+
       render :index, layout: false
     end
   end