Tally lights projects

[michalramus]

https://github.com/wifi-tally/wifi-tally
https://github.com/michalramus/TallyLights
https://github.com/AronHetLam/ATEM_tally_light_with_ESP8266

[frans-ebu]

@michalramus if you want to include those, could you please suggest PRs with a more elaborate description, as per https://github.com/ebu/awesome-broadcasting/blob/master/CONTRIBUTING.md