bugfix: /Makefile: config: ignore errors if ~/bin/make exists

inputs/FIA/COND/postprocess.sql: filtering formula: documented that this was created by Brad, and provided the URL to it on nimoy

inputs/CVS/cvs.~.clean_up.sql: remove plot.realLatitude/realLongitude, since this is private data that should not be publicly visible

inputs/CVS/cvs.~.clean_up.sql: remove plot.realLatitude/realLongitude, since this is private data that should not be publicly visible

bin/make_analytical_db: don't regenerate family_higher_plant_group from the NCBI data because the lookup table is now prepopulated as part of the schema

bin/import_all: don't import NCBI because the lookup table is now prepopulated as part of the schema

schemas/vegbien.sql: include the family_higher_plant_group lookup table values so that these don't need to be regenerated from the NCBI nodes whenever the DB is reloaded

schemas/vegbien.sql: taxonlabel_update_ancestors(): don't do an index scan if the value being scanned for is NULL, to support testing this function without the indexes in place, without extra full-table scans for NULL values affecting things. this can be used to determine if the function is actually using the indexes, by turning them off and seeing if the runtime changes.

schemas/util.sql: explain2table(): documented usage:
PERFORM util.explain2table($$
query
$$);

schemas/util.sql: explain2table(): by default, use the util.explain table