Release: goobook 1.8

[Christer Sjöholm]

* Fixed so that the included client_secrets.json is installed with the source.

- PyPI home: http://pypi.python.org/pypi/goobook
- Code Repository: http://gitlab.com/goobook/goobook
- Issue tracker: http://gitlab.com/goobook/goobook
- Mailing list: http://groups.google.com/group/goobook

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Christer Sjöholm

[Jason Gilliland]

Thanks again!