Added data, fixed paths

...b_checkpoints/StructureTensor2D_Examples-checkpoint.ipynb

...b_checkpoints/StructureTensor3D_Examples-checkpoint.ipynb

StructureTensor2D_Examples.ipynb

StructureTensor3D_Examples.ipynb

__pycache__/st2d.cpython-37.pyc

__pycache__/st3d.cpython-37.pyc

example_data_2D/.DS_Store

example_data_2D/10X.png

example_data_2D/drawn_fibres_B.png

example_data_2D/drawn_field.png

example_data_2D/oct_im_org.png

example_data_2D/short_fibres.png

example_data_2D/short_fibres_with_background.png

example_data_3D/.DS_Store

example_data_3D/multi_cube.mat