Made it work with a CC1101 SPI Adapter

[herwinvw]

Thanks for this hassio addon.

I made some modifications to get it to work with the CC1101 SPI Adapter from https://allgeek.de/2017/07/31/cc1101-spi-raspberry-adapter-fuer-homegear-homematicmax/.

For now they can be found in the fork here:
https://github.com/herwinvw/hassio-addons

It would be cool to somehow merge this back into your repository, if you're interested. I'm not sure how though, any ideas? I basically created a different config json to hook up the spi adapter+made some slight modifications to the Docker file to make it work on my system (some packages somehow didn't work for me) and slim it down a bit to what I really needed.