move unicorn into the heroku group till we decide if we switch completly to it or not

Gemfile

@@ -7,7 +7,6 @@ gem 'foreman', '0.27.0'
 gem 'whenever'
 
 gem 'thin', '~> 1.3.1',    :require => false
-gem 'unicorn', '~> 4.1.1', :require => false
 
 # authentication
 
@@ -39,6 +38,7 @@ end
 
 group :heroku do
   gem 'pg'
+  gem 'unicorn', '~> 4.1.1', :require => false
 end
 
 gem 'settingslogic', :git => 'git://github.com/binarylogic/settingslogic.git'