vsquicciarini/madys: MADYS v0.3.0-beta

This repository includes the beta version of MADYS: the Manifold Age Determination for Young Stars, a flexible Python tool for age and mass determination of young stellar and substellar objects. In this first full release, MADYS automatically retrieves and cross-matches photometry from several catalogs, estimates interstellar extinction, and derives age and mass estimates for individual objects through isochronal fitting. Harmonising the heterogeneity of publicly-available isochrone grids, the tool allows to choose amongst 17 models, many of which with customisable astrophysical parameters (for a total of about 120 grids). Note that the grids are not downloaded when installing MADYS. Instructions on how to download them are provided in the .ipynb notebook in GitHub's /example directory. Several dedicated plotting function are provided to allow a visual perception of the numerical output