Add Some Comments to unixfs/format

License: MIT
Signed-off-by: Zander Mackie <zmackie@gmail.com>

format.go

@@ -51,7 +51,7 @@ func FilePBData(data []byte, totalsize uint64) []byte {
 	return data
 }
 
-// Returns Bytes that represent a Directory
+//FolderPBData returns Bytes that represent a Directory.
 func FolderPBData() []byte {
 	pbfile := new(pb.Data)
 	typ := pb.Data_Directory
@@ -65,6 +65,7 @@ func FolderPBData() []byte {
 	return data
 }
 
+//WrapData marshals raw bytes into a `Data_Raw` type protobuf message.
 func WrapData(b []byte) []byte {
 	pbdata := new(pb.Data)
 	typ := pb.Data_Raw
@@ -81,6 +82,7 @@ func WrapData(b []byte) []byte {
 	return out
 }
 
+//SymlinkData returns a `Data_Symlink` protobuf message for the path you specify.
 func SymlinkData(path string) ([]byte, error) {
 	pbdata := new(pb.Data)
 	typ := pb.Data_Symlink
@@ -184,6 +186,7 @@ type Metadata struct {
 	Size     uint64
 }
 
+//MetadataFromBytes Unmarshals a protobuf message into Metadata.
 func MetadataFromBytes(b []byte) (*Metadata, error) {
 	pbd := new(pb.Data)
 	err := proto.Unmarshal(b, pbd)