Add gl libraries to Windows installer

Fixed FootprintCorrection.py example / Updated CHANGELOG

Fix problem with slicing core shell particles

Update version, py docs and regenerate bindings for the release-1.16.0

Doxy: explain pre- and post-order strategy; add Wikipedia link.

Add header blocks, update @file entries, add/correct/extend Doxygen comments

Fix memory leakage both in GUI and PythonAPI

Add missing python examples

Switch to the new divergence machinery in GUI/specular and remove old tests