add unicorn support

Gemfile.lock

@@ -63,6 +63,14 @@ GEM
     bourne (1.4.0)
       mocha (~> 0.13.2)
     builder (3.0.4)
+    capistrano (2.14.2)
+      highline
+      net-scp (>= 1.0.0)
+      net-sftp (>= 2.0.0)
+      net-ssh (>= 2.0.14)
+      net-ssh-gateway (>= 1.1.0)
+    capistrano-unicorn (0.1.7)
+      capistrano
     chronic (0.9.1)
     coderay (1.0.9)
     daemons (1.1.9)
@@ -79,6 +87,7 @@ GEM
       multi_json (~> 1.0)
     factory_girl (4.2.0)
       activesupport (>= 3.0.0)
+    highline (1.6.18)
     hike (1.2.1)
     i18n (0.6.4)
     journey (1.0.4)
@@ -97,9 +106,13 @@ GEM
     multi_json (1.7.2)
     net-http-digest_auth (1.3)
     net-http-persistent (2.8)
+    net-scp (1.1.0)
+      net-ssh (>= 2.6.5)
     net-sftp (2.1.1)
       net-ssh (>= 2.6.5)
     net-ssh (2.6.6)
+    net-ssh-gateway (1.2.0)
+      net-ssh (>= 2.6.5)
     newrelic_rpm (3.6.0.78)
     nokogiri (1.5.9)
     ntlm-http (0.1.1)
@@ -191,6 +204,7 @@ DEPENDENCIES
   awesome_print
   aws-s3
   bcrypt-ruby
+  capistrano-unicorn
   daemons
   delayed_job
   delayed_job_active_record