Add a LICENSE file

[micolous]

Would be nice.

rdm880.py appears to be an interesting one, the apparent upstream (@synack) doesn't provide a license in their version of the repository.

His other projects are a mix of "no license" and "BSD", but it would be best to ask.

[gm-stack]

I've opened issue #1 on rdm880, so let's see what is said: JeremyGrosser/rfid#1

Personally I'd be fine with GPLv3 for the rest of the code.

(or perhaps I could be annoying, and make it AGPLv3 so everyone who pushes the big red button has to be able to obtain the source? :P)

[gm-stack]

2-clause BSD according to Synack.

[micolous]

Actually, anyone who presses the big red button should be able to obtain source anyway even if it was GPLv3 (not just AGPLv3), because the interactions are with peripherals directly connected to the Pi running the software, and not over a network.

But IANAL.