=== Added
* Python path management to easily include external python scripts. By default the directory
containing the document being generated is added to the python path when the file is generated.
The python path can be overridden on the command line. For packages python scripts can be
included in a separate directory and specified in the contents file.
=== Fixed
* 73: Do not crash on Doxygen files with invalid encoding or XML and report a clearer error.
* 73: Do not try to link to elements for which Doxygen has generated a refid, but where the
element itself is missing.