G-SchNet for OE62

OE62 data set + molecues generated with G-SchNet trained on the OE62 data set.

Minimal tutorial for using the SchNet+H models and the adapted G-SchNet model individually and for creating new molecules with targeted properties.

Includes the code from https://github.com/rhyan10/G-SchNetOE62 and https://github.com/schnarc/SchNarc/ used for this tutorial.