inputs/.TNRS/schema.sql: ValidMatchedTaxon: synced to MatchedTaxon

inputs/.TNRS/schema.sql: MatchedTaxon: added is_valid_match

inputs/.TNRS/schema.sql: tnrs: added tnrs__valid_match index to facilitate joining to only valid matches

inputs/.TNRS/schema.sql: tnrs: added is_valid_match derived column, to make it easier to select from only those TNRS results that can safely be used as a scrubbed name

lib/sh/util.sh: already_exists_msg(): added instructions on how to force-remake when the file already exists (prepend `rm=1` to the command)

inputs/VegBank/^taxon_observation.**.sample/test.xml.ref: updated inserted row count, now that CVS plots have been removed

bugfix: lib/runscripts/view.run: don't do anything in load_data(), to avoid trying to remake header.csv before the view is created. (for views, this instead happens in postprocess().)

lib/runscripts/table.run: reordered functions in the order they are called by import()

bugfix: inputs/VegBank/: need to remove inter-datasource duplicates from plot instead of the left-joined plot_ table, because the fkeys needed to do the cascading deletes are all to the plot table. this requires doing the column-renaming and postprocessing on plot before it's left-joined.

inputs/VegBank/plot_/create.sql: updated runtime (5 s) for previous bugfix