schemas/vegbien.sql: taxon: Added descriptive comment for data dictionary

schemas/vegbien.sql: VegBank-equivalent tables comments: Prepended "Equivalent to" before VegBank, so the equivalent tables statement can fit grammatically after a description of the table instead of having to be the first phrase in the descriptive table comment

schemas/vegbien.sql: taxon: VegBank-equivalent tables comment: Added plantName and applicable columns from plantStatus, which are also part of the taxon table

schemas/vegbien.sql: placepath: Added otherranks field, analogous to taxonpath.otherranks

schemas/vegbien.sql: taxonpath: Added descriptive comment for data dictionary

inputs/import.stats.xls: Updated import times

inputs/UNCC/Specimen/map.csv: accession: Documented that it's globally unique, although occasionally duplicated

inputs/REMIB/Specimen/map.csv: Remapped accession_number to catalogNumber because it is not globally unique, only (usually) unique within the institution providing the data ("acronym"). Note that there are nevertheless 11,869 rows where an accession_number appears multiple times within the same institution.

mappings/VegCore-VegBIEN.csv: Only use institutionCode+collectionCode+catalogNumber as the authorlocationcode (location-scoping ID) if there is actually a catalogNumber. Otherwise, the mapping process would attempt to create one location for each collection in the datasource, when there should be one location for each specimen.

schemas/py_functions.sql: _namePart(): Slice the first name from the beginning of the string to one word before the end, instead of one after the beginning, in order to avoid overlap with the last name, which starts one before the end, when there is only one word. Note that only one word means the name is assumed to be a last name. This assumption may not always be true, but when a datasource provides the name concatenated, an assumption must be made when not all name components are present.