Merge topic 'nifti' into master

IO/Image/CMakeLists.txt

IO/Image/Testing/Cxx/CMakeLists.txt

IO/Image/Testing/Cxx/TestNIFTI2.cxx

IO/Image/Testing/Cxx/TestNIFTIReaderAnalyze.cxx

IO/Image/Testing/Cxx/TestNIFTIReaderWriter.cxx

IO/Image/Testing/Data/Baseline/TestNIFTI2.png.md5

...mage/Testing/Data/Baseline/TestNIFTIReaderAnalyze.png.md5

IO/Image/Testing/Data/Baseline/TestNIFTIReaderWriter.png.md5

IO/Image/Testing/Python/CMakeLists.txt

IO/Image/Testing/Python/TestNIFTIReaderWriter.py

IO/Image/module.cmake

IO/Image/vtkNIFTIImageHeader.cxx

IO/Image/vtkNIFTIImageHeader.h

IO/Image/vtkNIFTIImagePrivate.h

IO/Image/vtkNIFTIImageReader.cxx

IO/Image/vtkNIFTIImageReader.h

IO/Image/vtkNIFTIImageWriter.cxx

IO/Image/vtkNIFTIImageWriter.h

Testing/Data/ANALYZE.HDR.md5

Testing/Data/ANALYZE.IMG.GZ.md5