Create signals.md
Create signals.md

I've seen this requested several times. Here is a first attempt.
kyledrake/puma,zBMNForks/puma,costi/puma,kyledrake/puma,prathamesh-sonpatki/puma,jbmyid/puma,tuvistavie/puma,zapnap/puma,eileencodes/puma,BenV/puma,BenV/puma,matthewd/puma,snow/puma,unleashed/puma,costi/puma,matthewd/puma,tuvistavie/puma,respire/puma,zBMNForks/puma,costi/puma,ngpestelos/puma,kyledrake/puma,respire/puma,puma/puma,nathansamson/puma,wallclockbuilder/puma,arturocadena/puma,arturocadena/puma,unleashed/puma,unleashed/puma,puma/puma,looker/puma,wallclockbuilder/puma,looker/puma,wallclockbuilder/puma,prathamesh-sonpatki/puma,ngpestelos/puma,jc00ke/puma,eileencodes/puma,eileencodes/puma,respire/puma,puma/puma,eileencodes/puma,snow/puma,zBMNForks/puma,zBMNForks/puma,looker/puma,looker/puma,snow/puma,BenV/puma,jc00ke/puma,zapnap/puma,nathansamson/puma,nathansamson/puma,prathamesh-sonpatki/puma,respire/puma,jbmyid/puma,ngpestelos/puma,snow/puma,unleashed/puma,jc00ke/puma,nathansamson/puma,costi/puma,jc00ke/puma,arturocadena/puma,ngpestelos/puma,wallclockbuilder/puma,matthewd/puma,arturocadena/puma,prathamesh-sonpatki/puma,jbmyid/puma,tuvistavie/puma,puma/puma,zapnap/puma,kyledrake/puma,jbmyid/puma,matthewd/puma,BenV/puma,zapnap/puma,tuvistavie/puma