BUG: Factory was instatiating all pixel types ask in factor
BUG: Factory was instatiating all pixel types ask in factor

Added class to only take the adress of member function when its in the
InstantiatedPixelIDTypesList. The means that these methods are no
longer instantated or compiled.

SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging