Dan Persa

Integrate the [guetzli](https://github.com/chai2010/guetzli-go) library from google.

Follow the rules [here](https://github.com/zalando/zalando-howto-open-source/blob/master/producttemplate.md)

Use the [template](https://github.com/nayafia/contributing-template)

https://github.com/zalando/zalando-howto-open-source/blob/master/READMEtemplate.md