Merge pull request mozilla#290 from tromey/version-0.6.1

Release version 0.6.1

Merge pull request mozilla#287 from tromey/version-0.6.0

Release version 0.6.0

Bump to 0.5.7

Bump to 0.5.6

Bump to version 0.5.5

Bump version to 0.5.4

Bump version to 0.5.3

Bump to version 0.5.2

Bump to version 0.5.1

Bump to version 0.5.0