COMP : Using the #ifdef OTB_USE_CURL is necessary actually to not compile the piece of code using curl methods
       when curl is not available

      Since openstreetmap return an error 400 when one of the limitation is crossed,
      use CurlHelper method in the OSMDataToVectorDataGenerator to test the bbox requested

      Those methods avoid the use of the C preprocessor directive #ifdef OTB_USE_CURL
      to get the curl status.

BUG test if support_data.band_name_list key is present in WorldView2ImageMetadataInterface::GetDefaultDisplay() to avoid itk exception in monteverdi viewer module. bug #0313

ENH : make the exception raised in the class otbCoordinateToName to avoid crash in Monteverdi modules

      to use them as SmartPointers, deallocating memory automatically
      (especially in the method RetrieveFileMulti)

      Using the CurlResource in the loop will make the easy handle destroyed
      at the end of each loop, then making the multi handle not working

      is initialization
      - Add 2 macros otbCurlCall and otbCurlMultiCall that throw exception if the
        code returned is different than CURLE_OK. Then, in order to clean proprely
        the curl environment and the files opened, 3 resources classes are added
        for :
             * In CurlHelper.cxx file to deal with the easy, multi, and FILE
               resource.
      - Change the prototype of the method TestUrlAvailability, to handle the
        error returned in the CurlHelper class. it returns a boolean for now.
        otbImageFileReader is affected due to this changes

TEST: add test about DEMToImageGenerator and SetOutputParametersFromImage() method with extract of sensor model

ENH: Adding a nodata flag and value for histogram estimation. This will allow to avoid wrong normalisation when viewing ortho-images