Add a gravatarUrl method in the Attendee model.
Merge branch 'master' of https://github.com/MozaicWorks/KeepInTouch
Take the gravatar size out of the domain logic.
Use the avatar:gravatar plugin.
We now do not need a gravatarUrl method.
Tidy up indentation in the test file.
Merge branch 'master' of https://github.com/MozaicWorks/KeepInTouch