Give the icon in the readme a white background (#133)

README.md

@@ -1,4 +1,4 @@
-# ![](https://github.com/Croydon/vertical-tabs-reloaded/raw/0.8.0/data/icon.png) Vertical Tabs Reloaded for Firefox
+# ![](https://github.com/Croydon/vertical-tabs-reloaded/raw/master/data/icon/icon-48-white.png) Vertical Tabs Reloaded for Firefox
 
 
 [![](https://img.shields.io/amo/v/vertical-tabs-reloaded.svg?style=flat-square)](https://addons.mozilla.org/firefox/addon/vertical-tabs-reloaded/) [![](https://img.shields.io/amo/d/vertical-tabs-reloaded.svg)](https://addons.mozilla.org/firefox/addon/vertical-tabs-reloaded/statistics/?last=365) [![](https://img.shields.io/amo/users/vertical-tabs-reloaded.svg)](https://addons.mozilla.org/firefox/addon/vertical-tabs-reloaded/statistics/usage/?last=365) [![](https://img.shields.io/amo/rating/vertical-tabs-reloaded.svg)](https://addons.mozilla.org/firefox/addon/vertical-tabs-reloaded/)

credits.md

@@ -17,5 +17,6 @@ This project did already got a lot of contribution over time. In fact, this repo
  * [myBestSoftAndPref](https://github.com/myBestSoftAndPref) - Show tab status (#67)
  * [Andy McKay](https://github.com/andymckay/sidebar-tabs) - Experimental WebExtensions Vertical Tabs implementation as a references
  * [joanbm](https://github.com/joanbm) - Fixing visibility of audio play symbol (#97)
+ * [unclechu](https://github.com/unclechu) - Redraw the VTR icons as actually svg files (#133)
 
 In addition to that a big thank you to all people who provided feedback, suggestions, ideas or who are simply using the add-on.