The OESzybki::GetEntropy method now checks for consistency
between the input argument for environment type and the already defined
solvent method in OESzybkiOptions. This check ensures that
the wrong entropy calculation is not silently performed.
The Advanced API section has been removed. The low-level functionality
offered through the advanced API has been improved and is now offered
as a new toolkit named OEFF TK. The documentation is available
at OEFF toolkits.