batch_learner: Added a debug flag to get intermediate outputs and save them to the HDF5 file.
advanced_image_processing: Added a debug flag to get intermediate outputs get returned through various functions.
advanced_image_processing: Added a method, get_active_label_image, to LabelImageCentroidProps in order to get a label image, which still contains centroids
advanced_image_processing: Added more debug output to get a better idea of what is going on. This is now complete and fixes #13.