Moved mask-generating code back into CFProjection (at least for the moment; because of the class hierarchy, it is otherwise tricky to deal with autosize_mask for SharedWeightCF (autosize_mask is required for c++ lissom matching)).
Moved mask-generating code back into CFProjection (at least for the moment; because of the class hierarchy, it is otherwise tricky to deal with autosize_mask for SharedWeightCF (autosize_mask is required for c++ lissom matching)).

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