BUG: Update SimpleFilters for Marksup Fiducials

Created by: blowekamp

ceb1a61 ENH: Update single Point and index types for Markups 4241d7b ENH: update the filter's seed list to use Markups nodes

https://github.com/SimpleITK/SlicerSimpleFilters/compare/2d26004dc45b708bbf71f18641b0ab4bce8992a7...master