Document and test RoundToBytes

[webmaster128]

See also drand/website#80

[webmaster128]

By the way, is there a reason this is 2x duplicated in the client code?

func roundToBytes(r int) []byte {
	var buff bytes.Buffer
	binary.Write(&buff, binary.BigEndian, uint64(r))
	return buff.Bytes()
}

client/test/result/mock/result.go and test/mock/grpcserver.go?

[willscott]

By the way, is there a reason this is 2x duplicated in the client code?

func roundToBytes(r int) []byte {
	var buff bytes.Buffer
	binary.Write(&buff, binary.BigEndian, uint64(r))
	return buff.Bytes()
}

client/test/result/mock/result.go and test/mock/grpcserver.go?

probably just a bad refactor