Use environment variable when run with production
Merge pull request #222 from sanemat/update-rails4

Update rails 4.0.4
Add rails_12factor
Merge pull request #227 from sanemat/fix-to-run-rails4-on-heroku

rails_12factor を追加
Run rake rails:update:bin
Merge pull request #228 from sanemat/add-bin-dir

Heroku で Rails4 を動かすために必要な実行ファイルを作成
Bundle update 20140418033148
Include capybara DSL
Add test case with index page
Fix test case about list gist
Modify index page