add godocs docu

doc.go

@@ -0,0 +1,33 @@
+// Copyright 2020 6543. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+/*
+
+Package hexcolor is a simple hexcolor normalizer
+
+Installation
+
+    go get -u github.com/6543/go-hexcolor
+
+Example
+
+    ```go
+    package main
+
+    import (
+    	"fmt"
+    	"github.com/6543/go-hexcolor"
+    )
+
+    func main() {
+    	c, err := hexcolor.NewHexColor("#adf")
+    	if err != nil {
+    		panic(err)
+    	}
+    	fmt.Println(c.ToString())
+    }
+    ```
+
+*/
+package hexcolor

hexcolor.go

@@ -1,3 +1,7 @@
+// Copyright 2020 6543. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package hexcolor
 
 import (

hexcolor_test.go

@@ -1,3 +1,7 @@
+// Copyright 2020 6543. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package hexcolor
 
 import (