Add latest version of the HDNNP handson notebook.

potentials/02-HDNNP/figures/2g.png

potentials/02-HDNNP/figures/2g_centered.png

potentials/02-HDNNP/figures/3g.png

potentials/02-HDNNP/figures/4g.png

potentials/02-HDNNP/figures/GOE_Logo_Quer_IPC_Farbe_RGB.png

potentials/02-HDNNP/figures/Rc.png

potentials/02-HDNNP/figures/Rc_centered.png

potentials/02-HDNNP/figures/angulars.png

potentials/02-HDNNP/figures/ann.png

potentials/02-HDNNP/figures/ann_centered.png

potentials/02-HDNNP/figures/eg.png

potentials/02-HDNNP/figures/goe_logo_quer_ipc_farbe_rgb.png

potentials/02-HDNNP/figures/hdnnp_presentation.png

potentials/02-HDNNP/figures/radials.png

potentials/02-HDNNP/handson.ipynb