Add a reference to an eventsource helper utility.
Add a reference to an eventsource helper utility.

callsign-core/cowboy_hybi00,manastech/cowboy,heroku/cowboy,paulperegud/cowboy,cad627/cowboy,layerhq/cowboy,callsign-core/cowboy_hybi00,essen/cowboy,cad627/cowboy,essen/cowboy,venkateshreddy/cowboy,K2InformaticsGmbH/cowboy,MSch/cowboy,Reimerei/cowboy,lpgauth/cowboy,hairyhum/cowboy,grahamrhay/cowboy,yangchengjian/cowboy,bobos/ecweb,ninenines/cowboy,LineMetrics/cowboy,nviennot/cowboy,piboye/cowboy,binarin/cowboy,binarin/cowboy,noname007/cowboy,turtleDeng/cowboy,CrankWheel/cowboy,pap/cowboy,kivra/cowboy,276361270/cowboy,odo/cowboy,LineMetrics/cowboy,layerhq/cowboy,LineMetrics/cowboy,bsmr-erlang/cowboy,acrispin/cowboy,lpgauth/cowboy,heroku/cowboy,unisontech/cowboy,rabbitmq/cowboy,omusico/cowboy,ferd/cowboyku,yangchengjian/cowboy,dangjun625/cowboy,heroku/cowboyku,manastech/cowboy,sile/cowboy,unisontech/cowboy,imdeps/cowboy,piboye/cowboy,rbalint/pkg-erlang-cowboy,linearregression/cowboyku