add GPL license file

fix typo

fix to not smooth mask images

remove not needed function in dataset

fix wrong paths in training scripts, adapt to updated interface of LandmarkVisualization

fix path in server_dataset_loop

fix wrongly named kwarg

load single valid landmarks also as list

allow parameters for docker script

add more documentation to dataset

also save_output_images in for vertebrae_segmentation per default

intermediat images of docker are now saved in data folder

more verbose error messages

adapt to new interface of write_multichannel_np

add verse2020