Add rinku to get auto_link support back

Gemfile

@@ -15,6 +15,7 @@ gem 'rails-i18n-updater'
 gem 'validates_email_format_of', '>= 1.5.1'
 gem 'open_id_authentication', '>= 1.1.0'
 gem 'prototype-rails'
+gem 'rinku', '>= 1.2.2', :require => 'rails_rinku'
 
 # Should only load if memcache is in use
 #gem 'memcached'

Gemfile.lock

@@ -111,6 +111,7 @@ GEM
       thor (~> 0.14.6)
     rake (0.9.2)
     rdoc (3.9.4)
+    rinku (1.2.2)
     rmagick (2.13.1)
     ruby-openid (2.1.8)
     sanitize (2.0.3)
@@ -153,6 +154,7 @@ DEPENDENCIES
   prototype-rails
   rails (= 3.1.0)
   rails-i18n-updater
+  rinku (>= 1.2.2)
   rmagick
   sanitize
   sass-rails (~> 3.1.0)

app/helpers/application_helper.rb

@@ -10,7 +10,7 @@ module ApplicationHelper
   end
 
   def linkify(text)
-    return auto_link(text, :link => :urls, :html => { :rel => "nofollow" })
+    return Rinku.auto_link(text, :urls, tag_options(:rel => "nofollow"))
   end
 
   def html_escape_unicode(text)