update rails. replace unicorn with puma in gemfile, procfile

Gemfile

@@ -8,7 +8,7 @@ def linux_only(require_as)
   RUBY_PLATFORM.include?('linux') && require_as
 end
-gem 'rails', '3.2.12'
+gem 'rails', '3.2.13'
 # DB
 gem 'mysql2', group: :mysql
@@ -21,8 +21,7 @@ gem 'settingslogic'
 gem 'devise'
 # Web server
-gem 'thin'
-gem "unicorn", "~> 4.4.0"
+gem "puma", "~> 2.0.0.b7"
 # Haml
 gem 'haml-rails'

Gemfile.lock

 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (3.2.12)
-      actionpack (= 3.2.12)
-      mail (~> 2.4.4)
-    actionpack (3.2.12)
-      activemodel (= 3.2.12)
-      activesupport (= 3.2.12)
+    actionmailer (3.2.13)
+      actionpack (= 3.2.13)
+      mail (~> 2.5.3)
+    actionpack (3.2.13)
+      activemodel (= 3.2.13)
+      activesupport (= 3.2.13)
       builder (~> 3.0.0)
       erubis (~> 2.7.0)
       journey (~> 1.0.4)
@@ -14,19 +14,19 @@ GEM
       rack-cache (~> 1.2)
       rack-test (~> 0.6.1)
       sprockets (~> 2.2.1)
-    activemodel (3.2.12)
-      activesupport (= 3.2.12)
+    activemodel (3.2.13)
+      activesupport (= 3.2.13)
       builder (~> 3.0.0)
-    activerecord (3.2.12)
-      activemodel (= 3.2.12)
-      activesupport (= 3.2.12)
+    activerecord (3.2.13)
+      activemodel (= 3.2.13)
+      activesupport (= 3.2.13)
       arel (~> 3.0.2)
       tzinfo (~> 0.3.29)
-    activeresource (3.2.12)
-      activemodel (= 3.2.12)
-      activesupport (= 3.2.12)
-    activesupport (3.2.12)
-      i18n (~> 0.6)
+    activeresource (3.2.13)
+      activemodel (= 3.2.13)
+      activesupport (= 3.2.13)
+    activesupport (3.2.13)
+      i18n (= 0.6.1)
       multi_json (~> 1.0)
     addressable (2.3.2)
     annotate (2.4.0)
@@ -64,7 +64,6 @@ GEM
       rest-client
       simplecov (>= 0.7)
       thor
-    daemons (1.1.9)
     devise (2.1.2)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)
@@ -72,7 +71,6 @@ GEM
       warden (~> 1.2.1)
     diff-lcs (1.1.3)
     erubis (2.7.0)
-    eventmachine (1.0.0)
     execjs (1.4.0)
       multi_json (~> 1.0)
     facter (1.6.17)
@@ -112,18 +110,17 @@ GEM
     kaminari (0.14.1)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
-    kgio (2.7.4)
     libv8 (3.3.10.4)
     libwebsocket (0.1.5)
       addressable
     listen (0.5.0)
-    mail (2.4.4)
+    mail (2.5.3)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     method_source (0.8.1)
-    mime-types (1.21)
-    multi_json (1.6.0)
+    mime-types (1.22)
+    multi_json (1.7.2)
     mysql2 (0.3.11)
     nokogiri (1.5.5)
     orm_adapter (0.4.0)
@@ -134,6 +131,8 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.3.1)
+    puma (2.0.0.b7)
+      rack (>= 1.1, < 2.0)
     quiet_assets (1.0.1)
       railties (~> 3.1)
     rack (1.4.5)
@@ -145,27 +144,26 @@ GEM
       rack
     rack-test (0.6.2)
       rack (>= 1.0)
-    rails (3.2.12)
-      actionmailer (= 3.2.12)
-      actionpack (= 3.2.12)
-      activerecord (= 3.2.12)
-      activeresource (= 3.2.12)
-      activesupport (= 3.2.12)
+    rails (3.2.13)
+      actionmailer (= 3.2.13)
+      actionpack (= 3.2.13)
+      activerecord (= 3.2.13)
+      activeresource (= 3.2.13)
+      activesupport (= 3.2.13)
       bundler (~> 1.0)
-      railties (= 3.2.12)
-    railties (3.2.12)
-      actionpack (= 3.2.12)
-      activesupport (= 3.2.12)
+      railties (= 3.2.13)
+    railties (3.2.13)
+      actionpack (= 3.2.13)
+      activesupport (= 3.2.13)
       rack-ssl (~> 1.3.2)
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
-    raindrops (0.10.0)
-    rake (10.0.3)
+    rake (10.0.4)
     rb-fsevent (0.9.1)
     rb-inotify (0.8.8)
       ffi (>= 0.5.0)
-    rdoc (3.12.1)
+    rdoc (3.12.2)
       json (~> 1.4)
     redis (3.0.2)
     redis-namespace (1.2.1)
@@ -227,24 +225,16 @@ GEM
     temple (0.5.5)
     therubyracer (0.10.2)
       libv8 (~> 3.3.10)
-    thin (1.5.0)
-      daemons (>= 1.0.9)
-      eventmachine (>= 0.12.6)
-      rack (>= 1.0.0)
-    thor (0.17.0)
-    tilt (1.3.3)
+    thor (0.18.1)
+    tilt (1.3.6)
     timers (1.0.2)
     treetop (1.4.12)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.35)
+    tzinfo (0.3.37)
     uglifier (1.3.0)
       execjs (>= 0.3.0)
       multi_json (~> 1.0, >= 1.0.2)
-    unicorn (4.4.0)
-      kgio (~> 2.6)
-      rack
-      raindrops (~> 0.7)
     warden (1.2.1)
       rack (>= 1.0)
     whenever (0.8.2)
@@ -278,8 +268,9 @@ DEPENDENCIES
   mysql2
   pg
   pry
+  puma (~> 2.0.0.b7)
   quiet_assets
-  rails (= 3.2.12)
+  rails (= 3.2.13)
   rake
   rb-fsevent
   rb-inotify
@@ -293,7 +284,5 @@ DEPENDENCIES
   stamp
   state_machine
   therubyracer
-  thin
   uglifier (>= 1.0.3)
-  unicorn (~> 4.4.0)
   whenever

Procfile

-web: bundle exec rails s -p $PORT
+web: bundle exec puma -p $PORT
 worker: bundle exec sidekiq -q runner,default