Adding PCA*, Distance*

src/Cxx.md

src/Cxx/Utilities/PCADemo.cxx

src/Cxx/Utilities/PCAStatistics.cxx

src/PythonicAPI.md

src/PythonicAPI/SimpleOperations/DistanceBetweenPoints.md

src/PythonicAPI/SimpleOperations/DistanceBetweenPoints.py

src/PythonicAPI/SimpleOperations/DistancePointToLine.md

src/PythonicAPI/SimpleOperations/DistancePointToLine.py

src/PythonicAPI/Utilities/PCADemo.py

src/PythonicAPI/Utilities/PCAStatistics.py

src/Testing/Baseline/PythonicAPI/Utilities/TestPCADemo.png