Add spring files
Change Ruby version to 2.0.0
Change locale and timezone.
Change generator settings.
Install simple_form.
Change DB to Postgres.
Add blog scaffold.
Change style. / Remove unused files.
Install heroku_san
Setup unicorn for Heroku.
Setup for staging environment.
Remove duplicated pg gem.
Use rails_12factor in staging environment.
Install New Relic.
Delete precompiled assets / Update heroku.yml.
Ignore public/assets.
Add uuid to log.