fix 0-dilation/closing bug in cs_extraction_steps.py, various updates

scripts/point_party/semseg_gt.py

...alysis/compartment_pts/evaluation/evaluate_on_synapses.py

syconn/analysis/compartment_pts/evaluation/inference.py

syconn/analysis/compartment_pts/matrix/dnh_matrix_plot.py

...nn/analysis/compartment_pts/matrix/dnh_matrix_raw_data.py

.../analysis/compartment_pts/matrix/launch_dnho_eval_full.py

syconn/analysis/compartment_pts/matrix/launch_syn_eval.py

...n/analysis/compartment_pts/matrix/launch_syn_inference.py

...ysis/compartment_pts/matrix/merge_matrix_score_results.py

...is/compartment_pts/matrix/merge_matrix_synapse_results.py

syconn/cnn/TrainData.py

syconn/cnn/cnn_semseg_lcp.py

syconn/cnn/cnn_semseg_ptcnv.py

syconn/extraction/cs_extraction_steps.py

syconn/extraction/cs_processing_steps.py

syconn/reps/super_segmentation_object.py