ENH: Default output image type to input image type
ENH: Default output image type to input image type

sumedhasingla/TubeTK,LucasGandel/TubeTK,LucasGandel/TubeTK,thewtex/TubeTK,sumedhasingla/TubeTK,matthieuheitz/TubeTK,LucasGandel/TubeTK,sumedhasingla/TubeTK,thewtex/TubeTK,matthieuheitz/TubeTK,KitwareMedical/ITKTubeTK,aylward/ITKTubeTK,matthieuheitz/TubeTK,thewtex/TubeTK,cdeepakroy/TubeTK,matthieuheitz/TubeTK,LucasGandel/TubeTK,KitwareMedical/TubeTK,KitwareMedical/ITKTubeTK,sumedhasingla/TubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,cdeepakroy/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,cdeepakroy/TubeTK,thewtex/TubeTK,KitwareMedical/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,aylward/ITKTubeTK,cdeepakroy/TubeTK