Code refactor

segmentation/dataset.py

segmentation/gui/gui.py

segmentation/gui/xml_util.py

segmentation/model.py

segmentation/modules.py

segmentation/network.py

segmentation/optimizer.py

...tation/postprocessing/__pycache__/__init__.cpython-36.pyc

...processing/__pycache__/baseline_extraction.cpython-36.pyc

segmentation/postprocessing/simplify_line.py

...ntation/preprocessing/__pycache__/__init__.cpython-36.pyc

.../preprocessing/__pycache__/basic_binarizer.cpython-36.pyc

...entation/preprocessing/__pycache__/ocrupus.cpython-36.pyc

segmentation/settings.py

segmentation/util.py