bump 5.0.8 (#359)

5.0.7 (#356)

adding SPM support

Merge pull request #323 from nytimes/develop

Bring develop into master for a 5.0.3 release.

Merge pull request #319 from nytimes/develop

merge developer -> master for 5.0.2

Merge pull request #314 from nytimes/chore/publish-5.0.1

publish 5.0.1

Merge pull request #311 from nytimes/develop

merge develop into master, for 5.0.0

Merge pull request #305 from nytimes/bump-version-to-4.0.1

Bump version to 4.0.1