add stubs, routes for add_annotation action

config/routes.rb

@@ -13,6 +13,7 @@ Rails.application.routes.draw do
       post 'show_detail'
       get 'add_to_fav'
       post 'add_to_fav'
+      post 'add_annotation'
     end
 
     namespace :courses_crawler do
@@ -21,6 +22,7 @@ Rails.application.routes.draw do
       post 'show_detail'
       get 'add_to_fav'
       post 'add_to_fav'
+      post 'add_annotation'
     end
 
     namespace :theses_crawler do
@@ -29,6 +31,7 @@ Rails.application.routes.draw do
       post 'show_detail'
       get 'add_to_fav'
       post 'add_to_fav'
+      post 'add_annotation'
     end
 
     namespace :projects_crawler do
@@ -37,6 +40,7 @@ Rails.application.routes.draw do
       post 'show_detail'
       get 'add_to_fav'
       post 'add_to_fav'
+      post 'add_annotation'
     end
   end