Just use regular link.

Author: sc68cal

README.md

@@ -20,7 +20,7 @@ This plugin enables Git-Tfs commands to be run from within GitExtensions
 Once installed, the plugin will appear in the GitExtensions "Plugins" menu. Selecting "git-tfs" from the menu.
 
 ## Screenshots
-![Screenshot](http://imgur.com/YOuH3.png)
+[Screenshot](http://imgur.com/YOuH3.png)
 
 
 ## Install