Allow MedTagger to upload Scans with sequences from a single DICOM file

[jpowie01]

Current Behavior

MedTagger allow to upload only 3D Scans which are made of multiple 2D DICOM files.

Expected Behavior

We should allow Administrators/Doctors to upload "movies" or sequences that are stored in a single DICOM file.

Additional comment

Here is an example of such DICOM file (ask @jpowie01 for example file):

>>> import SimpleITK as sitk
>>> import matplotlib.pyplot as plt
>>> image = sitk.ReadImage('sequence.dcm')
>>> array = sitk.GetArrayFromImage(image)
>>> array.shape
(29, 512, 512)
>>> plt.imshow(array[10], cmap='gray')
# Example Image will show

Classic 3D Scans contain such example DICOM files:

>>> import SimpleITK as sitk
>>> import matplotlib.pyplot as plt
>>> image = sitk.ReadImage('single.dcm')
>>> array = sitk.GetArrayFromImage(image)
>>> array.shape
(1, 1024, 1024)
>>> plt.imshow(array[0], cmap='gray')
# Example Image will show