Their presence is confusing to everyone, and they don't build appropriately anyway. Should anything break, the proper fix is to correct and/or add the relevant __main__.py script ... not use one of these.
This is a port of Google's CSSMess example. To build, first read the top-level README (run boostrap and buildout) Then, run ./build.sh or: ../../bin/pyjsbuild CSSMess.py and then open output/CSSMess.html in a web browser. == Issues == Doesn't work with IE, since IE doesn't support children on a style element: DOM.appendChild(DOM.createElement('style'), <something>) failes