Add Support for Trisquel

[TechnologyClassroom]

Would there be interest in adding Trisquel to netboot.xyz? Trisquel is a fork of Ubuntu with all proprietary software removed and complies with GNU's FSDG.

https://trisquel.info/

The net install images can be found at http://mirror.fsf.org/trisquel-images/ and start with the trisquel-netinst_ string.

[jiderlesi]

I aslo think it's a good idea to add support for trisquel.