Add StockChanges index

config/initializers/extensions.rb

@@ -9,4 +9,11 @@ class String
       string
     end
   end
-end
+end
+
+class Array
+  def cumulative_sum
+    csum = 0
+    self.map{|val| csum += val}
+  end
+end

config/routes.rb

@@ -96,6 +96,8 @@ Foodsoft::Application.routes.draw do
         get :articles_search
         get :fill_new_stock_article_form
       end
+      
+      resources :stock_changes, :only => [:index], :to => 'stock_changes'
     end
 
     resources :suppliers do