Fix screenshot link in readme

README.md

@@ -6,7 +6,7 @@
 
 <p align="center">Slate helps you create beautiful, intelligent, responsive API documentation.</p>
 
-<p align="center"><img src="https://dl.dropboxusercontent.com/u/95847291/github%20images/slate/slate_screenshot_new.png" width=700 alt="Screenshot of Example Documentation created with Slate"></p>
+<p align="center"><img src="https://raw.githubusercontent.com/lord/img/master/screenshot-slate.png" width=700 alt="Screenshot of Example Documentation created with Slate"></p>
 
 <p align="center"><em>The example above was created with Slate. Check it out at <a href="https://lord.github.io/slate">lord.github.io/slate</a>.</em></p>