update README

Author: qdwang

README.md

@@ -1,4 +1,7 @@
-# quickraw
+# quickraw 
+[![](https://img.shields.io/crates/v/quickraw?style=flat-square)](https://crates.io/crates/quickraw)
+[![](https://img.shields.io/github/v/release/qdwang/quickraw?label=cli-release&style=flat-square)](https://github.com/qdwang/quickraw/releases/latest)
+
 A pure rust library to read Raw files from cameras.
 
 Checkout docs here: [https://docs.rs/quickraw](https://docs.rs/quickraw)
@@ -10,3 +13,4 @@ Please check: [supported-models.md](supported-models.md)
 * Raw file process logic from [https://www.odelama.com/photo/Developing-a-RAW-Photo-by-hand/](https://www.odelama.com/photo/Developing-a-RAW-Photo-by-hand/)
 * Raw file process logic from [https://github.com/LibRaw/LibRaw](https://github.com/LibRaw/LibRaw)
 * Some decoding methods from [https://github.com/pedrocr/rawloader](https://github.com/pedrocr/rawloader)
+* Sample files for testing from [https://raw.pixls.us/](https://raw.pixls.us/)