A native format file is needed for a single pharmacophore and a library of pharmacophores

[dprada]

The library needs a way to store a single pharmacophore and a list of pharmacophores. I am not sure what could be the best way to do it. JSON files are fast to be read and human-readable. It could probably be a good decision to go with single pharmacophores. But, if we want to store a large number of pharmacophores... producing several JSON files is not a solution, maybe a native hdf5 file to work with pharmacophores collections?