* Uses PubChem to translate the InChiKey to InChI.
2023.7.18
2023.7.9
* Added properties stored as JSON, which allows, vectors, tensors, etc.
2023.4.6
* Handle uncertainties in CIF files expressed as '(x)' at end of value.
2023.3.30
* Improved naming of molecule in QCSchema * Added creation of configurations from QCSchema objects.
2023.2.13
2022.11.20 -- Added a method to copy a configuration. Added a new method to the `system` class, `copy_configuration`, that creates a copy of the configuration using the same atomset and bonset, but new coordinates and cell so that any changes to coordinates and cell are not shared between the configurations. By default it copies the current configuration.