Merge pull request puppetlabs#364 from hunner/release_3.3.1

Release 3.3.1

Merge pull request puppetlabs#356 from apenney/33-release

Prepare a 3.3.0 release.

Merge pull request puppetlabs#306 from apenney/320-release

Prepare a 3.2.0 release.

Merge pull request puppetlabs#294 from kbarber/maint/master/release_310

Release 3.1.0

Merge pull request puppetlabs#279 from apenney/300-release

Prepare 3.0.0 release.

Merge pull request puppetlabs#278 from apenney/300-release

Prepare 3.0.0-rc3 release.