Renamed turn-propn-pair-families-into-id-families.

New name propn-families-to-id-families.
renamed add-mapnode-id-to-pair-map

to add-id-to-pair-map
Added map add-id-to-pair-map into match-components-of-propn-pair

Note this is done separately also in make-acme-node-vec.  Maybe
these operations should be combined.
commented out obsolete (?) code
Added add-families-wts-to-mat.

This function is supposed to add the positive weights to a zeroed weight
matrix.  Not quite right.  And not tested.