Updated GFVO examples to match PeerJ paper; rewritten GFVO intro.
Updated GFVO examples to match PeerJ paper; rewritten GFVO intro.

BioInterchange/BioInterchange,BioInterchange/BioInterchange,BioInterchange/BioInterchange,BioInterchange/BioInterchange,BioInterchange/BioInterchange,BioInterchange/BioInterchange