Update Twig documentation (2.1.0, 1.31.0)

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -566,7 +566,7 @@ credits = [
     'https://creativecommons.org/licenses/by/3.0/'
   ], [
     'Twig',
-    '2009-2016 The Twig Team',
+    '2009-2017 The Twig Team',
     'BSD',
     'http://twig.sensiolabs.org/license'
   ], [

lib/docs/scrapers/twig.rb

@@ -1,8 +1,6 @@
 module Docs
   class Twig < UrlScraper
     self.type = 'sphinx'
-    self.release = '1.29'
-    self.base_url = 'http://twig.sensiolabs.org/doc/'
     self.root_path = 'index.html'
     self.initial_paths = %w(extensions/index.html)
     self.links = {
@@ -11,14 +9,24 @@ module Docs
     }
 
     options[:attribution] = <<-HTML
-      &copy; 2009&ndash;2016 by the Twig Team<br>
+      &copy; 2009&ndash;2017 by the Twig Team<br>
       Licensed under the three clause BSD license.<br>
-      The Twig logo is &copy; 2010&ndash;2016 SensioLabs
+      The Twig logo is &copy; 2010&ndash;2017 SensioLabs
     HTML
 
     html_filters.push 'twig/clean_html', 'twig/entries'
 
     options[:container] = 'div.bd > div.content'
     options[:skip] = %w(deprecated.html advanced_legacy.html)
+
+    version '2' do
+      self.release = '2.1.0'
+      self.base_url = 'http://twig.sensiolabs.org/doc/2.x/'
+    end
+
+    version '1' do
+      self.release = '1.31.0'
+      self.base_url = 'http://twig.sensiolabs.org/doc/1.x/'
+    end
   end
 end