Specify ruby version in Gemfile
DRY specs
Improve API a little
Bump version number to 0.2.0
Update Readme
Merge branch 'release/0.2.0'
Merge tag '0.2.0' into develop

Improve upon suggestions
Bump version number to 0.2.1
Re-add pg gem - required by heroku's default buildpack
Merge branch 'hotfix/0.2.1'
Merge tag '0.2.1' into develop

0.2.1