gzip.GzipInflater -> gzip.Inflater
gzip.NewGzipInflater -> gzip.NewInflater
zlib.NewZlibInflater -> zlib.NewInflater

io.ByteReader deleted in favor of bytes.Buffer
io.NewByteReader -> bytes.NewBuffer

R=r
DELTA=52  (3 added, 0 deleted, 49 changed)
OCL=33589
CL=33592