Specify a version for puma and bundle

Gemfile

@@ -48,7 +48,7 @@ gem "whenever",                 "~> 0.6.8"
 
 # web server
 
-gem "puma"
+gem "puma",                     "~> 1.6.3"
 
 group :development, :test do
   gem "database_cleaner",       "~> 0.6.7"

Gemfile.lock

@@ -103,7 +103,6 @@ GEM
     draper (0.11.1)
       activesupport (>= 2.3.10)
     erubis (2.7.0)
-    eventmachine (1.0.0)
     exceptional (2.0.32)
       rack
     execjs (1.4.0)
@@ -131,7 +130,6 @@ GEM
       jquery-rails
       railties (>= 3.1.0)
     json (1.7.7)
-    kgio (2.7.4)
     launchy (2.0.5)
       addressable (~> 2.2.6)
     libv8 (3.3.10.4)
@@ -179,6 +177,8 @@ GEM
     polyglot (0.3.3)
     pony (1.4)
       mail (> 2.0)
+    puma (1.6.3)
+      rack (~> 1.2)
     pygmentize (0.0.3)
     quiet_assets (1.0.1)
       railties (~> 3.1)
@@ -204,7 +204,6 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
-    raindrops (0.10.0)
     rake (10.0.3)
     ratom (0.7.2)
       libxml-ruby (~> 2.3.2)
@@ -240,10 +239,6 @@ GEM
       tilt (~> 1.1, != 1.3.0)
     therubyracer (0.9.10)
       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)
     tire (0.4.3)
@@ -263,10 +258,6 @@ GEM
     uglifier (1.0.4)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)
-    unicorn (4.0.1)
-      kgio (~> 2.4)
-      rack
-      raindrops (~> 0.6)
     vcr (1.10.3)
     webmock (1.6.4)
       addressable (~> 2.2, > 2.2.5)
@@ -312,6 +303,7 @@ DEPENDENCIES
   ostatus (~> 0.0.12)
   osub (~> 0.0.6)
   pony (~> 1.3)
+  puma (~> 1.6.3)
   pygmentize (~> 0.0.3)
   quiet_assets (~> 1.0.0)
   rails (= 3.2.12)
@@ -325,12 +317,10 @@ DEPENDENCIES
   show_me_the_cookies (~> 1.1.0)
   simplecov (~> 0.4.0)
   therubyracer (~> 0.9.9)
-  thin (~> 1.5.0)
   tire (~> 0.4.1)
   twitter (~> 3.5.0)
   tzinfo (~> 0.3.29)
   uglifier (~> 1.0.0)
-  unicorn (~> 4.0.1)
   vcr (~> 1.10.3)
   webmock (~> 1.6.4)
   whenever (~> 0.6.8)