rename Read / Write into Unmarshal / Marshal when needed

Read() / Write() are used to read / write from streams, while
Unmarshal() / Marshal() are used to decode / encode from / to bytes.

pkg/base/body.go

@@ -39,16 +39,16 @@ func (b *body) read(header Header, rb *bufio.Reader) error {
 	return nil
 }
 
-func (b body) writeSize() int {
+func (b body) marshalSize() int {
 	return len(b)
 }
 
-func (b body) writeTo(buf []byte) int {
+func (b body) marshalTo(buf []byte) int {
 	return copy(buf, b)
 }
 
-func (b body) write() []byte {
-	buf := make([]byte, b.writeSize())
-	b.writeTo(buf)
+func (b body) marshal() []byte {
+	buf := make([]byte, b.marshalSize())
+	b.marshalTo(buf)
 	return buf
 }