Add border-radius to readme logo

Author: bntzio

readme.md

@@ -1,16 +1,16 @@
-<p align="center"><img width="125" src="https://github.com/bntzio/github-classic/blob/master/assets/icon_128.png?raw=true"></p>
+<p align="center"><img width="125" style="border-radius:100%" src="https://github.com/bntzio/github-classic/blob/master/assets/icon_128.png?raw=true"></p>
 
 <h1 align="center">GitHub Classic</h1>
 
 <p align="center">Chrome extension to return to the classic GitHub look 😎</p>
 
-## Features
+### Features
 
 * Super light-weight (only 71KB)
 * Instantly get the classic GitHub look (white header)
 * Always updating!
 * No user permissions needed!
 
-## Screenshot
+### Screenshot
 
 ![GitHub Classic](screenshot.png)