copy the other repo and make packages install.

util.go

@@ -0,0 +1,11 @@
+package opentimestamps
+
+import "encoding/hex"
+
+func mustDecodeHex(in string) []byte {
+	out, err := hex.DecodeString(in)
+	if err != nil {
+		panic(err)
+	}
+	return out
+}