--- a/Gemfile.lock	Tue Mar 01 16:36:10 2016 +0900
+++ b/Gemfile.lock	Fri May 13 03:56:07 2016 +0900
@@ -2,43 +2,45 @@
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
   specs:
-    actionmailer (4.2.5.2)
-      actionpack (= 4.2.5.2)
-      actionview (= 4.2.5.2)
-      activejob (= 4.2.5.2)
+    actioncable (5.0.0.rc1)
+      actionpack (= 5.0.0.rc1)
+      nio4r (~> 1.2)
+      websocket-driver (~> 0.6.1)
+    actionmailer (5.0.0.rc1)
+      actionpack (= 5.0.0.rc1)
+      actionview (= 5.0.0.rc1)
+      activejob (= 5.0.0.rc1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.5.2)
-      actionview (= 4.2.5.2)
-      activesupport (= 4.2.5.2)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
+    actionpack (5.0.0.rc1)
+      actionview (= 5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
+      rack (~> 2.x)
+      rack-test (~> 0.6.3)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.5.2)
-      activesupport (= 4.2.5.2)
+    actionview (5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (4.2.5.2)
-      activesupport (= 4.2.5.2)
-      globalid (>= 0.3.0)
-    activemodel (4.2.5.2)
-      activesupport (= 4.2.5.2)
-      builder (~> 3.1)
-    activerecord (4.2.5.2)
-      activemodel (= 4.2.5.2)
-      activesupport (= 4.2.5.2)
-      arel (~> 6.0)
-    activesupport (4.2.5.2)
+    activejob (5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
+      globalid (>= 0.3.6)
+    activemodel (5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
+    activerecord (5.0.0.rc1)
+      activemodel (= 5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
+      arel (~> 7.0)
+    activesupport (5.0.0.rc1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    arel (6.0.3)
-    autoprefixer-rails (6.3.3.1)
+    arel (7.0.0)
+    autoprefixer-rails (6.3.6)
       execjs
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
@@ -51,46 +53,52 @@
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.1)
+    concurrent-ruby (1.0.2)
     erubis (2.7.0)
     execjs (2.6.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
     i18n (0.7.0)
-    jquery-rails (4.1.0)
-      rails-dom-testing (~> 1.0)
+    jquery-rails (4.1.1)
+      rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.3)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.99.1)
+    mail (2.6.4)
+      mime-types (>= 1.16, < 4)
+    method_source (0.8.2)
+    mime-types (3.0)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0221)
     mini_portile2 (2.0.0)
     minitest (5.8.4)
-    newrelic_rpm (3.15.0.314)
+    newrelic_rpm (3.15.2.317)
+    nio4r (1.2.1)
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     pg (0.18.4)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.4)
+    rack (2.0.0.rc1)
+      json
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.5.2)
-      actionmailer (= 4.2.5.2)
-      actionpack (= 4.2.5.2)
-      actionview (= 4.2.5.2)
-      activejob (= 4.2.5.2)
-      activemodel (= 4.2.5.2)
-      activerecord (= 4.2.5.2)
-      activesupport (= 4.2.5.2)
+    rails (5.0.0.rc1)
+      actioncable (= 5.0.0.rc1)
+      actionmailer (= 5.0.0.rc1)
+      actionpack (= 5.0.0.rc1)
+      actionview (= 5.0.0.rc1)
+      activejob (= 5.0.0.rc1)
+      activemodel (= 5.0.0.rc1)
+      activerecord (= 5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.5.2)
-      sprockets-rails
-    rails-assets-commonmark (0.24.0)
-    rails-assets-highlightjs (9.1.0)
+      railties (= 5.0.0.rc1)
+      sprockets-rails (>= 2.0.0)
+    rails-assets-commonmark (0.25.1)
+    rails-assets-highlightjs (9.2.0)
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
     rails-dom-testing (1.0.7)
@@ -99,34 +107,37 @@
       rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
-    railties (4.2.5.2)
-      actionpack (= 4.2.5.2)
-      activesupport (= 4.2.5.2)
+    railties (5.0.0.rc1)
+      actionpack (= 5.0.0.rc1)
+      activesupport (= 5.0.0.rc1)
+      method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (10.5.0)
-    sass (3.4.21)
+    rake (11.1.2)
+    sass (3.4.22)
     sass-rails (5.0.4)
       railties (>= 4.0.0, < 5.0)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sprockets (3.5.2)
+    sprockets (3.6.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.0.3)
+    sprockets-rails (3.0.4)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     thor (0.19.1)
     thread_safe (0.3.5)
-    tilt (2.0.2)
+    tilt (2.0.3)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (2.7.2)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
+    uglifier (3.0.0)
+      execjs (>= 0.3.0, < 3)
+    websocket-driver (0.6.3)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.2)
 
 PLATFORMS
   ruby
@@ -140,7 +151,7 @@
   newrelic_rpm
   pg
   quiet_assets
-  rails (~> 4.2.0)
+  rails (>= 5.0.0.rc1, < 5.1)
   rails-assets-commonmark!
   rails-assets-highlightjs!
   sass-rails (~> 5.0)