more verbose comments about the D and I matrices
more verbose comments about the D and I matrices

pombredanne/dedupe,nmiranda/dedupe,nmiranda/dedupe,pombredanne/dedupe,tfmorris/dedupe,tfmorris/dedupe,01-/dedupe,dedupeio/dedupe,dedupeio/dedupe,neozhangthe1/dedupe,01-/dedupe,davidkunio/dedupe,datamade/dedupe,dedupeio/dedupe-examples,neozhangthe1/dedupe,davidkunio/dedupe,datamade/dedupe