Bundle update

Gemfile.lock

 GIT
   remote: git://github.com/activeadmin/activeadmin.git
-  revision: ad4caab46f1813bedf5acdb7739a17da546a5609
+  revision: 1e61b4e2bc7a886be73970ff30a1c756e1b7bee1
   specs:
     activeadmin (1.0.0.pre)
       arbre (~> 1.0, >= 1.0.2)
@@ -149,8 +149,8 @@ GEM
     formtastic (3.0.0)
       actionpack (>= 3.2.13)
     formtastic_i18n (0.1.1)
-    geocoder (1.2.5)
-    guard (2.8.1)
+    geocoder (1.2.6)
+    guard (2.8.2)
       formatador (>= 0.2.4)
       listen (~> 2.7)
       lumberjack (~> 1.0)
@@ -284,9 +284,9 @@ GEM
     ref (1.0.5)
     responders (1.1.2)
       railties (>= 3.2, < 4.2)
-    rubocop (0.27.0)
+    rubocop (0.27.1)
       astrolabe (~> 1.3)
-      parser (>= 2.2.0.pre.6, < 3.0)
+      parser (>= 2.2.0.pre.7, < 3.0)
       powerpack (~> 0.0.6)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.4)
@@ -347,7 +347,7 @@ GEM
       tinymce-rails (~> 4.0)
     turbolinks (2.5.1)
       coffee-rails
-    twitter (5.12.0)
+    twitter (5.13.0)
       addressable (~> 2.3)
       buftok (~> 0.2.0)
       equalizer (~> 0.0.9)