Add ruby-version.
Move logic to model.
Update RSpec.
Delete unused specs.
Add basic test.
Add .powenv.sample.
Use env values instead of pit.
Reture pit.
Delete heroku.yml.
Add heroku.yml.sample.
Change env keys.
Specify ruby version.
Setup feature spec.
Write feature spec.
Update to Ruby 2.1.1.
Update to Rails 4.
install 12factor.
Update twitter client.
Update links.
Delete heroku.yml.sample.