cosmetic readme update

Author: zendive

README.md

@@ -1,4 +1,6 @@
-![jsdiff](./src/img/panel-icon28.png) [available at chrome web-store](https://chrome.google.com/webstore/detail/jsdiff-devtool/iefeamoljhdcpigpnpggeiiabpnpgonb)
+# ![jsdiff](./src/img/panel-icon28.png) [console.diff()]()
+[![console.diff()](https://developer.chrome.com/webstore/images/ChromeWebStore_BadgeWBorder_v2_206x58.png)](https://chrome.google.com/webstore/detail/jsdiff-devtool/iefeamoljhdcpigpnpggeiiabpnpgonb)
+
 ---
 Chrome devtools extension intended to display result of deep in-memory object
 comparisons with the help of dedicated console commands.