schemas/vegbien.sql: Changed `timestamp with time zone` fields to `date` because time information is not stored in these fields, and it's confusing to have an arbitrary timezone (the server's timezone) and an arbitrary time (midnight) set for input data that only has a precision to the nearest day

sql_gen.py: null_sentinels: Added entry for date

lib/PostgreSQL-MySQL.csv: custom types: Also exclude date, datetime

README.TXT: Documentation: To import and scrub just the test taxonomic names: Run `make backups/TNRS.backup/restore` in the background because it takes awhile

mappings/VegCore.csv: Re-sourced TaxonomicRankEnum fields to the official TCS schema rather than the TCS version in VegX

schemas/vegbien.sql: taxonrank: Updated source to the TCS schema (rather than VegBank) for the new, expanded list. Note that although the list itself was compiled from the TCS version in VegX, the official TCS download does not differ from the VegX TCS in the TaxonomicRankEnum fields (the xs: namespace has just been replaced with xsd: by VegX).

schemas/vegbien.sql: analytical_db_view: taxonconcept: Join again on the accepted_concept_id in order to use the accepted taxonconcept rather than the verbatim taxonconcept from the datasource

schemas/: svn:ignore log files

Added inputs/.NCBI/. This uses many of the new schema and mappings features, such as taxonconcept.sourceaccessioncode and parentTaxonID

mappings/VegCore-VegBIEN.csv: identifyingtaxonomicname: Don't create if taxonconcept has an explicit parent, because the taxonName (which is generally only a component of the full taxonomic name, e.g. specificEpithet) is not globally unique. Datasources that provide name components in such a way that levels at or below family can't be directly concatenated cannot currently receive an identifyingtaxonomicname for input to TNRS.