mappings/VegCore.csv: Added cultivatedBasis

mappings/VegCore.csv: Added scientificNameWithMorphospecies

mappings/VegCore.csv: Added speciesBinomial

schemas/vegbien.sql: analytical_db_view: Generate species by concatenating genus and specific epithet, since according to Brad this field is actually the binomial, not the specificEpithet

schemas/vegbien.sql: Removed no longer used plot_change_over_time view. Use one of the queries at <https://projects.nceas.ucsb.edu/nceas/projects/bien/wiki/Plot_change_over_time_analysis> instead.

mappings/VegCore-VegBIEN.csv: location: Populate sourceaccessioncode with locationID + subplot when subplot is unique only within the parent plot, so that location always has a sourceaccessioncode to use as the plotCode in analytical_db_view

lib/PostgreSQL-MySQL.csv: Remove views because they can contain arbitrary expressions, whose syntax may not be compatible with MySQL

schemas/vegbien.sql: analytical_db_view: Use location.sourceaccessioncode as plotCode instead of authorlocationcode because authorlocationcode isn't globally unique (for subplots, it's only unique within the parent plot)

schemas/vegbien.sql: plantobservation: Made taxonoccurrence_id optional when sourceaccessioncode is specified, so that aggregateoccurrence doesn't get pruned away in datasource tables that link just a stemobservation to a plantobservation (and therefore don't provide a taxonoccurrence to satisfy the previous taxonoccurrence_id NOT NULL constraint)

schemas/vegbien.sql: aggregateoccurrence: Made taxonoccurrence_id optional when sourceaccessioncode is specified, so that aggregateoccurrence doesn't get pruned away in datasource tables that link just a stemobservation to a plantobservation (and therefore don't provide a taxonoccurrence to satisfy the previous taxonoccurrence_id NOT NULL constraint)