Update Less documentation (2.3.1)

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -187,7 +187,7 @@ credits = [
     'https://raw.githubusercontent.com/laravel/framework/master/LICENSE.txt'
   ], [
     'Less',
-    '2009-2014 The Core Less Team',
+    '2009-2015 The Core Less Team',
     'CC BY',
     'http://creativecommons.org/licenses/by/3.0/'
   ], [

lib/docs/scrapers/less.rb

@@ -1,7 +1,7 @@
 module Docs
   class Less < UrlScraper
     self.type = 'less'
-    self.version = '2.1.0'
+    self.version = '2.3.1'
     self.base_url = 'http://lesscss.org'
     self.root_path = '/features'
     self.initial_paths = %w(/functions)
@@ -14,7 +14,7 @@ module Docs
     options[:trailing_slash] = false
 
     options[:attribution] = <<-HTML
-      &copy; 2009&ndash;2014 The Core Less Team<br>
+      &copy; 2009&ndash;2015 The Core Less Team<br>
       Licensed under the Creative Commons Attribution License 3.0.
     HTML
   end