- A new `PlatformAPI.connect_oauth` function creates a Heroics
  `Client` configured to use an OAuth token.
- The setup instructions `README.md` describe setting up a client with
  an OAuth token, instead of basic auth.
- Bumped version.
Merge pull request #2 from heroku/prefer-oauth

- A new `PlatformAPI.connect_oauth` function creates a Heroics
  `Client` configured to use an OAuth token.
- The setup instructions `README.md` describe setting up a client with
  an OAuth token, instead of basic auth.
- Bumped version.