Update rails to 4.2.0

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 ruby '2.1.5'
 
-gem 'rails', '4.1.8'
+gem 'rails', '4.2.0'
 gem 'pg', '0.17.1'
 gem 'jquery-rails', '3.1.2'
 gem 'newrelic_rpm'

Gemfile.lock

@@ -1,74 +1,99 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.1.8)
-      actionpack (= 4.1.8)
-      actionview (= 4.1.8)
+    actionmailer (4.2.0)
+      actionpack (= 4.2.0)
+      actionview (= 4.2.0)
+      activejob (= 4.2.0)
       mail (~> 2.5, >= 2.5.4)
-    actionpack (4.1.8)
-      actionview (= 4.1.8)
-      activesupport (= 4.1.8)
-      rack (~> 1.5.2)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+    actionpack (4.2.0)
+      actionview (= 4.2.0)
+      activesupport (= 4.2.0)
+      rack (~> 1.6.0)
       rack-test (~> 0.6.2)
-    actionview (4.1.8)
-      activesupport (= 4.1.8)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-html-sanitizer (~> 1.0, >= 1.0.1)
+    actionview (4.2.0)
+      activesupport (= 4.2.0)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-    activemodel (4.1.8)
-      activesupport (= 4.1.8)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-html-sanitizer (~> 1.0, >= 1.0.1)
+    activejob (4.2.0)
+      activesupport (= 4.2.0)
+      globalid (>= 0.3.0)
+    activemodel (4.2.0)
+      activesupport (= 4.2.0)
       builder (~> 3.1)
-    activerecord (4.1.8)
-      activemodel (= 4.1.8)
-      activesupport (= 4.1.8)
-      arel (~> 5.0.0)
-    activesupport (4.1.8)
-      i18n (~> 0.6, >= 0.6.9)
+    activerecord (4.2.0)
+      activemodel (= 4.2.0)
+      activesupport (= 4.2.0)
+      arel (~> 6.0)
+    activesupport (4.2.0)
+      i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.1)
+      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    arel (5.0.1.20140414130214)
+    arel (6.0.0)
     builder (3.2.2)
     erubis (2.7.0)
+    globalid (0.3.0)
+      activesupport (>= 4.1.0)
     hike (1.2.3)
-    i18n (0.6.11)
+    i18n (0.7.0)
     jquery-rails (3.1.2)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
     json (1.8.1)
     kgio (2.9.2)
+    loofah (2.0.1)
+      nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
     mime-types (2.4.3)
-    minitest (5.4.3)
+    mini_portile (0.6.1)
+    minitest (5.5.0)
     multi_json (1.10.1)
     newrelic_rpm (3.9.7.266)
+    nokogiri (1.6.5)
+      mini_portile (~> 0.6.0)
     pg (0.17.1)
-    rack (1.5.2)
+    rack (1.6.0)
     rack-test (0.6.2)
       rack (>= 1.0)
-    rails (4.1.8)
-      actionmailer (= 4.1.8)
-      actionpack (= 4.1.8)
-      actionview (= 4.1.8)
-      activemodel (= 4.1.8)
-      activerecord (= 4.1.8)
-      activesupport (= 4.1.8)
+    rails (4.2.0)
+      actionmailer (= 4.2.0)
+      actionpack (= 4.2.0)
+      actionview (= 4.2.0)
+      activejob (= 4.2.0)
+      activemodel (= 4.2.0)
+      activerecord (= 4.2.0)
+      activesupport (= 4.2.0)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.1.8)
-      sprockets-rails (~> 2.0)
+      railties (= 4.2.0)
+      sprockets-rails
+    rails-deprecated_sanitizer (1.0.3)
+      activesupport (>= 4.2.0.alpha)
+    rails-dom-testing (1.0.5)
+      activesupport (>= 4.2.0.beta, < 5.0)
+      nokogiri (~> 1.6.0)
+      rails-deprecated_sanitizer (>= 1.0.1)
+    rails-html-sanitizer (1.0.1)
+      loofah (~> 2.0)
     rails_12factor (0.0.2)
       rails_serve_static_assets
       rails_stdout_logging
     rails_serve_static_assets (0.0.2)
     rails_stdout_logging (0.0.3)
-    railties (4.1.8)
-      actionpack (= 4.1.8)
-      activesupport (= 4.1.8)
+    railties (4.2.0)
+      actionpack (= 4.2.0)
+      activesupport (= 4.2.0)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.13.0)
-    rake (10.4.0)
+    rake (10.4.2)
     sprockets (2.12.3)
       hike (~> 1.2)
       multi_json (~> 1.0)
@@ -95,6 +120,6 @@ DEPENDENCIES
   jquery-rails (= 3.1.2)
   newrelic_rpm
   pg (= 0.17.1)
-  rails (= 4.1.8)
+  rails (= 4.2.0)
   rails_12factor (= 0.0.2)
   unicorn (= 4.8.3)

config/environments/production.rb

@@ -31,7 +31,7 @@
 
   # Disable Rails's static asset server
   # In production, Apache or nginx will already do this
-  config.serve_static_assets = false
+  config.serve_static_files = false
 
   # Enable serving of images, stylesheets, and javascripts from an asset server
   # config.action_controller.asset_host = "http://assets.example.com"