ADD: generic SAR calibration framework

Code/BasicFilters/otbFunctionToImageFilter.txx

Code/Radiometry/otbSarParametricMapFunction.h

Code/Radiometry/otbSarParametricMapFunction.txx

Code/Radiometry/otbSarRadiometricCalibrationFunction.h

Code/Radiometry/otbSarRadiometricCalibrationFunction.txx

Code/Radiometry/otbSarRadiometricCalibrationFunctor.h

Code/Radiometry/otbSarRadiometricCalibrationToImageFilter.h

.../Radiometry/otbSarRadiometricCalibrationToImageFilter.txx

Testing/Code/Radiometry/CMakeLists.txt

Testing/Code/Radiometry/otbRadiometryTests9.cxx

Testing/Code/Radiometry/otbSarParametricMapFunctionTest.cxx

...e/Radiometry/otbSarParametricMapFunctionToImageFilter.cxx

.../Code/Radiometry/otbSarRadiometricCalibrationFunction.cxx

...g/Code/Radiometry/otbSarRadiometricCalibrationFunctor.cxx

...iometry/otbSarRadiometricCalibrationToImageFilterTest.cxx