ENH: Turning CloudDetection into CloudEstimator

Code/FeatureExtraction/otbCloudDetectionFilter.h

Code/FeatureExtraction/otbCloudDetectionFilter.txx

Code/FeatureExtraction/otbCloudDetectionFunctor.h

Code/FeatureExtraction/otbCloudEstimatorFilter.h

Code/FeatureExtraction/otbCloudEstimatorFilter.txx

Code/FeatureExtraction/otbCloudEstimatorFunctor.h

Testing/Code/FeatureExtraction/CMakeLists.txt

...Code/FeatureExtraction/otbCloudEstimatorDefaultFilter.cxx

Testing/Code/FeatureExtraction/otbCloudEstimatorFilter.cxx

...ing/Code/FeatureExtraction/otbCloudEstimatorFilterNew.cxx

...ng/Code/FeatureExtraction/otbFeatureExtractionTests11.cxx