Update README.md

Author: yqritc

README.md

@@ -1,5 +1,6 @@
 # Android-ScalableImageView
 [![License](https://img.shields.io/badge/license-Apache%202-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0)
+[![Download](https://api.bintray.com/packages/yqritc/maven/android-scalableimageview/images/download.svg)](https://bintray.com/yqritc/maven/android-scalableimageview/_latestVersion)
 
 *__VideoView having same scale feature is also [available here](https://github.com/yqritc/Android-ScalableVideoView)__*