Add README for fixtures
Add README for fixtures

nerevu/uptime,Maluuba/uptime,f33rx/docker-uptime,memezilla/uptime,fzaninotto/uptime,SpringerPE/uptime,0x8BADFOOD/uptime,ptisp/uptime,cloudfoundry-community/uptime-cfready,prune998/uptime,ifavo/uptime,b-pedzik/uptime,SaravananPerumal23/uptime2,brianjking/uptime,SufianHassan/uptime,blackboard/uptime,heamon7/uptime,phanan/uptime,f33rx/docker-uptime,blendlabs/uptime,arthurpro/uptime,askcs/uptime,MichaelStephan/uptime,nerevu/uptime,SaravananPerumal23/uptime2,gleicon/uptime,aregpetrosyan/web,traskat/uptime,aregpetrosyan/web,GuptaVineet-IBM/upTime_ford,sinkingshriek/uptime,scalp42/uptime,bathree/uptime,rkmallik/uptime-openshift,erpframework/uptime,RafeHatfield/nodeuptime,WillGuan105/uptime,nacyot/uptime,ptisp/uptime,rkmallik/uptime-openshift,jraigneau/watchdog