re-added rainloop logo to readme.md

Author: AndrewSav

README.md

@@ -1,5 +1,7 @@
 # hardware/rainloop
 
+![](https://i.goopics.net/nI.png)
+
 ### What is this ?
 
 Rainloop is a simple, modern & fast web-based client. More details on the [official website](http://www.rainloop.net/).