upgrade rails due to security fixes

Gemfile_rails4.lock

@@ -105,11 +105,11 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.0.1)
-      actionpack (= 4.0.1)
+    actionmailer (4.0.2)
+      actionpack (= 4.0.2)
       mail (~> 2.5.4)
-    actionpack (4.0.1)
-      activesupport (= 4.0.1)
+    actionpack (4.0.2)
+      activesupport (= 4.0.2)
       builder (~> 3.1.0)
       erubis (~> 2.7.0)
       rack (~> 1.5.2)
@@ -118,16 +118,16 @@ GEM
       actionpack (>= 4.0.0.beta, < 5.0)
     active_model_serializers (0.8.1)
       activemodel (>= 3.0)
-    activemodel (4.0.1)
-      activesupport (= 4.0.1)
+    activemodel (4.0.2)
+      activesupport (= 4.0.2)
       builder (~> 3.1.0)
-    activerecord (4.0.1)
-      activemodel (= 4.0.1)
+    activerecord (4.0.2)
+      activemodel (= 4.0.2)
       activerecord-deprecated_finders (~> 1.0.2)
-      activesupport (= 4.0.1)
+      activesupport (= 4.0.2)
       arel (~> 4.0.0)
     activerecord-deprecated_finders (1.0.3)
-    activesupport (4.0.1)
+    activesupport (4.0.2)
       i18n (~> 0.6, >= 0.6.4)
       minitest (~> 4.2)
       multi_json (~> 1.3)
@@ -211,7 +211,7 @@ GEM
     html_truncator (0.3.1)
       nokogiri (~> 1.5)
     httpauth (0.2.0)
-    i18n (0.6.8)
+    i18n (0.6.9)
     ice_cube (0.11.1)
     image_optim (0.9.1)
       exifr (~> 1.1.3)
@@ -315,19 +315,19 @@ GEM
       rack
     rack-test (0.6.2)
       rack (>= 1.0)
-    rails (4.0.1)
-      actionmailer (= 4.0.1)
-      actionpack (= 4.0.1)
-      activerecord (= 4.0.1)
-      activesupport (= 4.0.1)
+    rails (4.0.2)
+      actionmailer (= 4.0.2)
+      actionpack (= 4.0.2)
+      activerecord (= 4.0.2)
+      activesupport (= 4.0.2)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.0.1)
+      railties (= 4.0.2)
       sprockets-rails (~> 2.0.0)
     rails-observers (0.1.2)
       activemodel (~> 4.0)
-    railties (4.0.1)
-      actionpack (= 4.0.1)
-      activesupport (= 4.0.1)
+    railties (4.0.2)
+      actionpack (= 4.0.2)
+      activesupport (= 4.0.2)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.12.0)
@@ -519,7 +519,7 @@ DEPENDENCIES
   rack-cors
   rack-mini-profiler!
   rack-protection
-  rails
+  rails (= 4.0.2)
   rails-observers
   rails_multisite!
   rake