Add Gopkg.toml to pin satori/go.uuid to v1.2
Add Gopkg.toml to pin satori/go.uuid to v1.2

Hopefully this should take care of the unreleased breaking changes
introduced in `github.com/satori/go.uuid`. For more info about this, see
https://github.com/satori/go.uuid/issues/66.

renstrom/shortuuid