BUG: Fl_Widget destructor generates one last FL_HIDE event which causes segmentation fault (maybe because the object is already in its desctruction process). Therefore we should avoid to process FL_HIDE events.

ENH : add a Maximum Image Calculator (for DrawLine filter ) and possibility to tune parameters (Angle & distance)

STYLE: Testing/Code/FeatureExtraction/CMakeLists.txt Code/Radiometry/otbMultiChannelRAndGAndNIRIndexImageFilter.h Code/FeatureExtraction/otbUrbanAreaDetectionImageFilter.txx Code/FeatureExtraction/otbUrbanAreaDetectionImageFilter.h