Adding data.go, does nothing for now.

pkg/storage/donut/data/data_v1/data.go

@@ -0,0 +1,23 @@
+package data_v1
+
+import "errors"
+
+type DataHeader struct {
+	Key           string
+	Part          int
+	ContentType   string
+	Length        uint64
+	Md5sum        []byte
+	EncoderParams EncoderParams
+}
+
+type EncoderParams struct {
+	Length    int
+	K         int
+	M         int
+	Technique int
+}
+
+func Write() error {
+	return errors.New("Not Implemented")
+}