Clarified readme.

README.md

@@ -8,12 +8,17 @@ This idea came from reading [Onion](http://www.theonion.com/articles/i-am-so-sta
 
 We have the same app in these frameworks. 
 
+### Microframeworks:
+
 * [appengine](http://code.google.com/appengine/)  
 * [flask](http://flask.pocoo.org/)  
 * [web.py](http://webpy.org/)
 * [juno](https://github.com/breily/juno)
 * [bottle](http://bottle.paws.de/docs/dev/index.html)
 * [itty](http://toastdriven.com/fresh/itty-sinatra-inspired-micro-framework/)
+
+### Full stack frameworks:
+
 * [django](http://djangoproject.com/)
 * [web2py](http://web2py.com/)
 * [pyramid](http://docs.pylonshq.com/faq/pyramid.html)