bump nokogiri

Gemfile

@@ -76,7 +76,7 @@ gem 'rails-i18n', '0.7.2'
 
 # parsing
 
-gem 'nokogiri', '1.5.5'
+gem 'nokogiri', '1.5.6'
 gem 'redcarpet', "2.2.2"
 gem 'roxml', :git => 'https://github.com/Empact/roxml.git', :ref => '7ea9a9ffd2338aaef5b0'
 gem 'ruby-oembed', '0.8.8'

Gemfile.lock

@@ -233,7 +233,7 @@ GEM
     net-ssh (2.6.2)
     net-ssh-gateway (1.1.0)
       net-ssh (>= 1.99.1)
-    nokogiri (1.5.5)
+    nokogiri (1.5.6)
     oauth (0.4.7)
     oauth2 (0.8.0)
       faraday (~> 0.8)
@@ -454,7 +454,7 @@ DEPENDENCIES
   mini_magick (= 3.4)
   mobile-fu (= 1.1.1)
   mysql2 (= 0.3.11)
-  nokogiri (= 1.5.5)
+  nokogiri (= 1.5.6)
   omniauth (= 1.1.1)
   omniauth-facebook (= 1.4.1)
   omniauth-tumblr (= 1.1)