ADD: put sform and qform through to end up in the same place; fall back to qform if non-NIFTY source image


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5019 42a5c34f-2066-0410-bec5-ba365beb4995
ADD: helper function to make qform from matrix


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5020 42a5c34f-2066-0410-bec5-ba365beb4995