Add support for smarter MSFT cab extraction

At the moment the extractcode lib extracts CAB files al-right, but does not understand the underlying structure of the files. You end up with a pile of files names after some hash or UUID and not real file names as they would be installed.

The format is more or less documented here: https://msdn.microsoft.com/en-us/library/bb417343.aspx
https://github.com/n3k/PyCAB seems to implement some code to handle this in pure Python
Wine has an implementation of cabarc which runs likely only under wine.
cabextract is a portable, standalone extractor: http://cabextract.org.uk/