ADD : class otbPointSetFunction & Remove all files concerning otbCountImagefunction

Code/BasicFilters/otbCountImageFunction.h

Code/BasicFilters/otbPointSetFunction.h

Code/BasicFilters/otbPointSetFunction.txx

Testing/Code/BasicFilters/CMakeLists.txt

Testing/Code/BasicFilters/otbBasicFiltersTests11.cxx

Testing/Code/BasicFilters/otbCountImageFunctionTest.cxx

Testing/Code/BasicFilters/otbPointSetFunctionNew.cxx