As in the case of the XYZ IE, names of classes and functions were changed,

according to the "Style Guide for Python Code" 
(http://www.python.org/dev/peps/pep-0008/) and the recent review
(http://codereview.appspot.com/6815052). Some slight changes were done, too. 
Extensive tests have shown that the code is still well working.

Blendphys