Change dict to Label2D object in LabelReader

[Daniel451]

The final label information in LabelReader...

MLHelper/MLHelper/_image_label_reader/LabelReader.py

Line 122 in d78c31c

self._labels[os.path.join(dirpath, filename)] = {

...should not be a dictionary, but an instance of the new Label2D object.

This issue includes checking existing tests and involves writing new test cases.

[Daniel451]

fixed in f5097d4