update to capistrano3

Gemfile.lock

@@ -68,16 +68,21 @@ GEM
     buftok (0.2.0)
     builder (3.2.2)
     byebug (6.0.0)
-    capistrano (2.15.6)
-      highline
-      net-scp (>= 1.0.0)
-      net-sftp (>= 2.0.0)
-      net-ssh (>= 2.0.14)
-      net-ssh-gateway (>= 1.1.0)
-    capistrano-ext (1.2.1)
-      capistrano (>= 1.0.0)
-    capistrano-unicorn (0.2.0)
-      capistrano (< 3.0)
+    capistrano (3.4.0)
+      i18n
+      rake (>= 10.0.0)
+      sshkit (~> 1.3)
+    capistrano-bundler (1.1.4)
+      capistrano (~> 3.1)
+      sshkit (~> 1.2)
+    capistrano-rails (1.1.3)
+      capistrano (~> 3.1)
+      capistrano-bundler (~> 1.1)
+    capistrano-rbenv (2.0.3)
+      capistrano (~> 3.1)
+      sshkit (~> 1.3)
+    capistrano3-unicorn (0.2.1)
+      capistrano (~> 3.1, >= 3.1.0)
     chronic (0.10.2)
     coderay (1.1.0)
     coffee-rails (4.1.0)
@@ -89,6 +94,7 @@ GEM
     coffee-script-source (1.9.1.1)
     coinbase (4.0.7)
       bigdecimal
+    colorize (0.7.7)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
     crass (1.0.2)
@@ -160,8 +166,6 @@ GEM
     net-sftp (2.1.2)
       net-ssh (>= 2.6.5)
     net-ssh (2.9.2)
-    net-ssh-gateway (1.2.0)
-      net-ssh (>= 2.6.5)
     netrc (0.10.3)
     newrelic_rpm (3.13.0.299)
     nokogiri (1.6.6.2)
@@ -265,6 +269,10 @@ GEM
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
+    sshkit (1.7.1)
+      colorize (>= 0.7.0)
+      net-scp (>= 1.1.2)
+      net-ssh (>= 2.8.0)
     statistics2 (0.54)
     streamio-ffmpeg (1.0.0)
     stripe (1.25.0)
@@ -324,9 +332,10 @@ DEPENDENCIES
   aws-sdk (~> 2)
   bcrypt-ruby
   byebug
-  capistrano
-  capistrano-ext
-  capistrano-unicorn
+  capistrano (~> 3.4.0)
+  capistrano-rails
+  capistrano-rbenv
+  capistrano3-unicorn
   coffee-rails
   coinbase
   daemons
@@ -337,6 +346,7 @@ DEPENDENCIES
   factory_girl
   ffaker
   gctools
+  highline
   kgio
   mechanize
   memcache-client