Improve iNat names => MO Names

[JoeCohen]

Some fine tuning, including edge and unusual cases:

• [x] Map iNat names to MO when MO has homonyms. Ideas:
  • [x] Ignore MO Names sensu whatever
  • [x] If there's only one MO preferred Name, use it.
  • [x] ??map using both author from iNat taxon_id? NO: would need 2nd iNat API request because iNat observation search results don't include author.
  • [x] ?Consider a Dictionary to translate iNat Names to MO Names? NO too much trouble for too little profit. It makes sense for MIrror because it's harder going from non-standard MO to iNat that vice versa.
• [ ] Subranks. Ex: https://www.inaturalist.org/observations/215997271
• [ ] Name s.l. (not an iNat taxon, can never be an iNat identification). Add a Naming if MO Name s.l. exists. (I don't want to create new s.l. because MO homonyms create problems.)
• [ ] Improve handling of provsisionals. Things like "Mollisia aurantioviolascens" should import as "Mollisia aurantioviolascens nom. prov." rather than "Mollisia “sp-aurantioviolascens” crypt. temp." Ex: https://www.inaturalist.org/observations/190105416. Possible algorithm: if the epithet is all l.c. letters, then make it nom. prov.

[JoeCohen]

iNat ranks and rank_levels through species for Fungi. Not complete -- omits some secondary ranks, infrageneric ranks	rank	level
kingdom	70
phylum	60
subphylum	57
class	50
order	40
family	30
genus	20
species	10