Merge pull request #454 from wonksing/doc/comment-codec

doc: Add comment to codec package

codec/codec.go

@@ -1,11 +1,15 @@
+/*
+Package codec provides a set of codecs to encode and decode various data types to and from
+byte slices([]byte).
+*/
 package codec
 
 import (
 	"fmt"
 	"strconv"
 )
 
-// Bytes codec is
+// Bytes is a commonly used codec to encode and decode string <-> []byte
 type Bytes struct{}
 
 // Encode does a type conversion into []byte