add tests for zlib compression
add tests for zlib compression

sschepens/goreq,ProjectFrank/goreq,appfront/goreq,dickeyxxx/goreq,CrowdSurge/goreq,vvelikodny/goreq,ryansb/goreq,admpub/goreq,gcnonato/goreq,evalphobia/goreq,MeGaPk/goreq,franela/goreq