inputs/CVS/taxonObservation_/map.csv: Use denorm_* denormalized taxonomic ranks in place of the normalized ranks when both are provided

input.Makefile: Maps validation: %/new_terms.csv: Fixed bug where need to filter unmapped_terms.csv's terms out of the output column, not the input column, because that's what the unmapped terms are generated from. Usually these columns are the same for unmapped terms, but sometimes an output term is changed from the original column's name but still doesn't match a VegCore term in mappings/VegCore-VegBIEN.csv.

input.Makefile: SVN: add: Added comment with instructions to update all inputs with these settings, using `make inputs/add`

input.Makefile: SVN: add: verify: Also ignore *.xlsx

README.TXT: Data import: Creating enough disk space: Added instructions for removing archived backups to free up space

inputs/CVS/taxonObservation_/map.csv: Fixed bug where taxonLevel, not taxonRank, needs to be mapped to taxonRank, because CVS's taxonRank is actually a number, while taxonLevel contains the corresponding text string

README.TXT: Data import: Before import, added step to make sure there is at least 100GB of disk space

sql_io.py: put_table(): is_function: Fixed bug where need to add the pkeys table's test pkey constraint after the data is added rather than when the empty table is created, to avoid adding a pkey constraint that will later be violated by data which returns multiple output rows for an input row (such as calls to _split())

sql_io.py: put_table(): insert_into_pkeys(): Allow callers to override run_query_into()'s add_pkey_ param in case the initial version of the pkeys table should not yet have the test pkey constraint (e.g. because data is added after the table is created)

README.TXT: Data import: Checking for errors: Search for "Command exited with non-zero status" to find errors, which is faster than checking that each input's log ends in "Encountered 0 error(s)"