Add init class
Merge pull request #52 from mcanevet/feature/init

Add init class
Prepare a 0.3.0 release.
Merge pull request #53 from apenney/021-release

Prepare a 0.3.0 release.
Prepare a 0.3.1 release.
Merge pull request #54 from apenney/031-release

Prepare a 0.3.1 release.