refine warnings on get_gbif_taxonomy

[mikeroswell]

Loving get_gbif_taxonomy so far.

I just ran it on a list my colleagues maintain of about 20,000 "valid" names of hymenopteran species. About 16 came back with the warning " Selected first of multiple equally ranked concepts!". Of these, the majority meet the following condition: scientificName == scientificNameStd. However, the ones that do not (at the treshold I used) seem likely to be mis-matched. It would be super helpful, I think, to provide a different warning on these two cases, as when going through and manually checking results, it's great to have warnings in cases where the automation probably worked, but it's also nice to be able to focus easily on the ones most likely to be a problem.

Thanks!