Updated design and description.

Author: stefanbohacek

README.md

@@ -1,6 +1,6 @@
 # Botmakers
 
-[![Join Botmakers!](https://botmakers.org/images/site-thumbnail-3.png)](http://botmakers.org)
+[![Join Botmakers!](https://botmakers.org/images/site-thumbnail-4.png)](http://botmakers.org)
 
 [Botmakers](http://botmakers.org) is the official [Botwiki.org](https://botwiki.org/) community, maintained by the [Botwiki.org team](https://github.com/botwiki). Image courtesy of [oldbookillustrations.com](http://www.oldbookillustrations.com/). Any questions? Need help? Reach out to [@fourtonfish](https://twitter.com/fourtonfish) or [stefan@fourtonfish.com](mailto:stefan@fourtonfish.com).