recognizing "species group" or "species complex" suffixes as indicators of infrageneric groupings

(First off: thanks for all the work on gnparser! It is shockingly efficient, precise, and complete.)

This may well be out of scope, but I am working with some data that uses names like

"Pelomedusa subrufa species complex"

between the genus-level and the species level.

In gnparser "v0.7.4" (running on ubuntu 18.10), this " species complex" is just treated as a part of the unparsed tail, and the name info reflects just the info for "Pelomedusa subrufa"