Merge branch 'bug-5544-MultiShellReconstruction'
Conflicts:
Modules/DiffusionImaging/Reconstruction/itkAnalyticalDiffusionQballReconstructionImageFilter.cpp
Modules/DiffusionImaging/Reconstruction/itkAnalyticalDiffusionQballReconstructionImageFilter.h
Plugins/org.mitk.gui.qt.diffusionimaging/src/internal/QmitkQBallReconstructionView.cpp
Plugins/org.mitk.gui.qt.diffusionimaging/src/internal/QmitkQBallReconstructionView.h