added rails12 gem

Gemfile

@@ -4,7 +4,13 @@ source 'http://rubygems.org'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '4.2.5.1'
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3'
+group :development do
+	gem 'sqlite3'
+end
+group :production do
+	gem 'pg'
+	gem 'rails_12factor'
+end
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets

Gemfile.lock

@@ -89,6 +89,7 @@ GEM
       mini_portile2 (~> 2.1.0)
       pkg-config (~> 1.1.7)
     orm_adapter (0.5.0)
+    pg (0.18.0.pre20141117110243-x86-mingw32)
     pkg-config (1.1.7)
     rack (1.6.4)
     rack-test (0.6.3)
@@ -173,6 +174,7 @@ DEPENDENCIES
   devise
   jbuilder (~> 2.0)
   jquery-rails
+  pg
   rails (= 4.2.5.1)
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)