ENH: Add Spline Driven Image Slicer as a remote module

From Spline Driven Image Slicer
http://www.vtkjournal.org/browse/publication/838"

Remote/SplineDrivenImageSlicer.remote.cmake

+#
+# Midas Journal 838
+#
+
+vtk_fetch_module(SplineDrivenImageSlicer
+  "Spline Driven Image Slicer - http://www.vtkjournal.org/browse/publication/838"
+  GIT_REPOSITORY https://github.com/lorensen/midas-journal-838.git
+# First working as a remote module
+  GIT_TAG 7994999c1e4b56ab546527788b7c894a138e97a1
+  )