inputs/.TNRS/schema.sql: tnrs_populate_fields(): documented runtime (17 min)

bugfix: inputs/GBIF/raw_occurrence_record/run: plant_fraction/make(): plant_fraction column: COUNT counts non-NULL rather than true values (which counter-intuitively includes false, because it's non-NULL), so need to add NULLIF around the boolean expression to turn it into a NULL-or-not expression. see http://vegpath.org/wiki/2013-06-06_conference_call#GBIF-subsetting-fix-plant_fraction-SQL-bug .

inputs/.TNRS/schema.sql: tnrs_populate_fields(): documented that when changing this function, you must regenerate the derived cols using `UPDATE tnrs SET "Name_submitted" = "Name_submitted"`

inputs/.TNRS/schema.sql: tnrs_populate_fields(): Is_plant: must match family as Family_score = 1 (as discussed during conference call vegpath.org/wiki/2013-05-30_conference_call#postprocess-TNRS-results-to-exclude-animals-with-genus-homonyms) instead of as Family_matched IS NOT NULL (as listed in Brad's formula at vegpath.org/wiki/Result_filtering#TNRS-results) because TNRS transforms animal to plant families via fuzzy matching, necessitating a Family_score check to ensure an exact match to a plant family that was not transformed from an animal family

inputs/.TNRS/schema.sql: added Is_plant derived field, which is populated using the formula at vegpath.org/wiki/Result_filtering#TNRS-results . note that the homonym filtering is currently excluded until we determine whether we can get direct access to the IRMNG homonyms database (http://www.cmar.csiro.au/datacentre/irmng/homonyms.htm). note also that changes to the TNRS schema cannot be fully tested until any TNRS client bugs are fixed, because the data.sql updater requires a working TNRS client to regenerate the sample data.

inputs/.TNRS/schema.sql: updated for current TSV schema: renamed Accepted_species->Accepted_name_species, Accepted_family->Accepted_name_family

bugfix: schemas/vegbien.sql: tnrs_input_name: must anti-join against MatchedTaxon rather than ValidMatchedTaxon to ensure that all of TNRS.tnrs is excluded from the input names. this prevents duplicates from appearing in the TNRS results, which would break the TSV import into TNRS.tnrs. it also prevents no-match names from being scrubbed repeatedly because they were not properly filtered out of the input names.

inputs/.TNRS/schema.sql: fixed whitespace

inputs/.TNRS/schema.sql: added MatchedTaxon view, which now just renames the columns but does not filter the results, and use it in ValidMatchedTaxon

inputs/.TNRS/schema.sql: MatchedTaxon: renamed to ValidMatchedTaxon since this view actually contains only the names with a valid match