Display version on about page

Author: adrien1018

app/views/about/index.html.erb

@@ -1,5 +1,5 @@
 <% set_page_title "About" %>
-<h4 class="page-header">About TIOJ <small>INFOR Online Judge</small></h4>
+<h4 class="page-header">About TIOJ <small>INFOR Online Judge <%= Tioj::VERSION %></small></h4>
 <h5>Site Info</h5>
 <div class="well">
 This site is powered by Ruby on Rails! <br >

config/application.rb

@@ -7,6 +7,7 @@
 Bundler.require(*Rails.groups)
 
 module Tioj
+  VERSION = '2.1.1'
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 7.0