Add license to the repo

[salekd]

which one?

[thiemehennis]

there we go again... :) what would you suggest David? And Thomas? We've had endless discussions about the hardware repo and also about the software, but that was a while ago. I suppose my preference is a somewhat restricted license: if you want to use it, be my guest, but adaptations need to be open sourced as well (copyleft). It can also be a permissive license, so allowing different licenses to be used in combination. Not so sure how these two aspects can be married into a single license. Any ideas/suggestions?

[thiemehennis]

@Beskhue