Adding ReadDICOM and ReadDICOMSeries

src/Python/IO/ReadDICOMSeries.py

src/PythonicAPI.md

src/PythonicAPI/IO/ReadDICOM.md

src/PythonicAPI/IO/ReadDICOM.py

src/PythonicAPI/IO/ReadDICOMSeries.md

src/PythonicAPI/IO/ReadDICOMSeries.py

src/PythonicAPI/Snippets/VTKDataClasses.md

src/Testing/Baseline/PythonicAPI/IO/TestReadDICOM.png

src/Testing/Baseline/PythonicAPI/IO/TestReadDICOMSeries.png