docs(README): add what is done

* add what is done

README.md

@@ -1,57 +1,33 @@
 # GoHeif - A go gettable decoder/converter for HEIC based on libde265
 
 ## Install
-- `heic2jpg` to convert HEIC files to JPG preserving exif 
 
-``` go get github.com/jdeng/goheif/...```
+- `heic2jpg` to convert HEIC files to JPG preserving exif
+
+```bash
+go get https://github.com/yosgo-opensource/goheif
+```
 
 - Tested
-  - Mac OS X (High Sierra) 
+
+  - Mac OS X (High Sierra)
   - Linux (Ubuntu 16.04 / GCC 5.4)
   - Windows 7 64bit with TDM-GCC 32 (GCC 5.1) and golang 1.12 windows/386
 
 - Code Sample
+
 ```
 func main() {
-	flag.Parse()
-	...
-  
-	fin, fout := flag.Arg(0), flag.Arg(1)
-	fi, err := os.Open(fin)
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer fi.Close()
-
-	exif, err := goheif.ExtractExif(fi)
-	if err != nil {
-		log.Printf("Warning: no EXIF from %s: %v\n", fin, err)
-	}
-
-	img, err := goheif.DecodeImage(fi)
-	if err != nil {
-		log.Fatalf("Failed to parse %s: %v\n", fin, err)
-	}
-
-	fo, err := os.OpenFile(fout, os.O_RDWR|os.O_CREATE, 0644)
-	if err != nil {
-		log.Fatalf("Failed to create output file %s: %v\n", fout, err)
-	}
-	defer fo.Close()
-
-	w, _ := newWriterExif(fo, exif)
-	err = jpeg.Encode(w, img, nil)
-	if err != nil {
-		log.Fatalf("Failed to encode %s: %v\n", fout, err)
-	}
-
-	log.Printf("Convert %s to %s successfully\n", fin, fout)
+	goheif.Decode(file)
 }
 ```
 
 ## What is done
 
+- Fixed MAX_PREFIX warning
+
 - Changes make to @bradfitz's (https://github.com/bradfitz) golang heif parser
+
   - Some minor bugfixes
   - A few new box parsers, noteably 'iref' and 'hvcC'
 
@@ -66,11 +42,11 @@ func main() {
 - goheif.go, libde265 golang binding and the `heic2jpg` utility are in MIT license
 
 ## Credits
+
 - heif parser by @bradfitz (https://github.com/go4org/go4/tree/master/media/heif)
 - libde265 (https://github.com/strukturag/libde265)
 - implementation learnt from libheif (https://github.com/strukturag/libheif)
 
 ## TODO
-- Upstream the changes to heif?
-
 
+- Upstream the changes to heif?