rename README -> README.md; uniform subdirectory name Python/, not

Examples/Python/simulation/ex07_Miscellaneous/DepthProbe.py

Examples/Python/simulation/ex07_Miscellaneous/FindPeaks.py

...lation/ex07_Miscellaneous/HalfSpheresInAverageTopLayer.py

...s/Python/simulation/ex07_Miscellaneous/MagneticSpheres.py

...les/Python/simulation/ex07_Miscellaneous/PolarizedSANS.py

...hon/simulation/ex07_Miscellaneous/SimulationParameters.py

Examples/Python/utils/__init__.py

Examples/Python/utils/plot_intensity_data.py

Examples/Python/utils/plot_intensity_data_diff.py

Examples/Python/utils/show2d.py

Examples/Python/utils/show2d_root.py

Examples/README.md

Examples/cpp/CylindersAndPrisms/README.md

Examples/cpp/README.md

Sample/StandardSamples/SizeDistributionModelsBuilder.h

Tests/Functional/Python/PyCore/README.md

Tests/Functional/Python/PyEmbedded/README.md

Tests/Functional/Python/PyFit/README.md

Tests/Functional/README.md

Tests/Performance/Python/README.md