3-hydroxyflavone models to be used with ML-server

3-hydroxyflavone models to be used in ML-server for ground and excited state ML/MM simulations.

• avail_models.tar.gz contains all the data necessary to load the GPX models;
• models_3HF.py contains the implementation of such models;
• input_3HF_meoh.tar.gz contains the amber input files (parameters, coordinates, plumed file and amber keywords) for running a simulation of 3-hydroxyflavone in methanol;
• input_3HF_mch.tar.gz contains the amber input files (parameters, coordinates, plumed file and amber keywords) for running a simulation of 3-hydroxyflavone in methylcyclohexane.