add screenshots to readme

warning, this is unformatted!

Author: clayjohn

README.md

@@ -1,3 +1,6 @@
 # realtime_clouds
 Experiment with generating clouds in real time on low end computer
 
+![dec7-3](https://user-images.githubusercontent.com/16521339/33801868-d6dbf1a4-dd1d-11e7-81e6-15e240b4f58f.png)
+![dec7-2](https://user-images.githubusercontent.com/16521339/33801869-d703b39c-dd1d-11e7-8428-ae999856aefc.png)
+![dec7-1](https://user-images.githubusercontent.com/16521339/33801870-d71a9328-dd1d-11e7-96a8-17ea2e15ec03.png)