Reading Legacy Converted Enhanced Images

I've converted a DICOM Series of Single-Frame MR Images to a Legacy Converted Enhanced MR Image using [MultiFrameImageFactory](http://www.dclunie.com/pixelmed/software/javadoc/com/pixelmed/dicom/MultiFrameImageFactory.html). When I try to load the generated multi-frame image using ITK's `imread` function, I get the following error:

```None
----> 1 image = itk.imread(input_filename)

~/.pyenvs/imglib/lib/python3.6/site-packages/itkExtras.py in imread(fileName, pixelType)
443 reader = itk.ImageFileReader[ImageType].New(FileName=fileName)
444 else:
--> 445 reader = itk.ImageFileReader.New(FileName=fileName)
446 reader.Update()
447 return reader.GetOutput()

~/.pyenvs/imglib/lib/python3.6/site-packages/itkTemplate.py in New(self, *args, **kwargs)
381 cur = itk.auto_pipeline.current
382 if self.__name__ == "itk::ImageFileReader":
--> 383 return self._NewImageFileReader(*args, **kwargs)
384 primary_input_methods = ('Input', 'InputImage', 'Input1')
385 if len(args) != 0:

~/.pyenvs/imglib/lib/python3.6/site-packages/itkTemplate.py in _NewImageFileReader(self, *args, **kwargs)
418 imageIO = itk.ImageIOFactory.CreateImageIO( inputFileName, itk.ImageIOFactory.ReadMode )
419 if not imageIO:
--> 420 raise RuntimeError("No ImageIO is registered to handle the given file.")
421 componentTypeDic= {"float": itk.F, "double": itk.D,
422 "unsigned_char": itk.UC, "unsigned_short": itk.US, "unsigned_int": itk.UI,

RuntimeError: No ImageIO is registered to handle the given file.
```

Support for Legacy Converted Enhanced Image Storage classes has only recently been added to GDCM:
https://github.com/malaterre/GDCM/blob/513a75c2f4dc704549223b831879c4a5fab00076/Source/DataStructureAndEncodingDefinition/gdcmMediaStorage.cxx#L144

This functionality is not yet in the GDCM code that comes with ITK:
https://github.com/InsightSoftwareConsortium/ITK/blob/6dffe29eb245f77ac27a17d0398fa3073cb6bf4c/Modules/ThirdParty/GDCM/src/gdcm/Source/DataStructureAndEncodingDefinition/gdcmMediaStorage.cxx#L143

Is there a change that the GDCM source code will be updated for the 5.0 release?

See also related [SimpleITK issue](https://github.com/SimpleITK/SimpleITK/issues/440)