* Split gdcmHeader through inheritance to create gdcmHeaderHelper
that would regroup all the heuristics above a gdcmHeader e.g. the
functions GetXsize(), GetXSpacing(), GetXImagePosition()...
* Split gdcmHeader through inheritance to create gdcmHeaderHelper
that would regroup all the heuristics above a gdcmHeader e.g. the
functions GetXsize(), GetXSpacing(), GetXImagePosition()...