mappings/VegCore.csv: Added accepted* taxonomic terms to store the scrubbed name

import_all: Clean up any new TNRS.tnrs entries before importing the TNRS data

inputs/.TNRS/tnrs/: Create using datasource schema.sql file instead of text header and postprocess.sql, for clarity and to enable using `make inputs/.TNRS/tnrs/install` to clean up the tnrs entries populated by tnrs_db

mappings/VegCore-VegBIEN.csv: Don't combine taxonRank with infraspecificEpithet if there is no infraspecificEpithet, because the taxonRank is only the infraspecificEpithet's prefix when there is an actual infraspecificEpithet. Often, taxonRank contains values like "genus" or "species" which cannot be used for this purpose.

tnrs.py: repeated_tnrs_request(): Just retry the request once with with debug turned on, to avoid cluttering the log output with the verbose debug info of multiple failed requests if the error is not resolved on retry

tnrs.py: tnrs_request(): repeated_tnrs_request(): Print all suppressed exceptions to stderr

tnrs.py: tnrs_request(): parse_response(): Include both the response headers and the response body in the InvalidResponse message

inputs/import.stats.xls: Updated import times

profiling.py: Profiler: Fixed bug where instance variable start had the same name as method start()

mappings/VegCore-VegBIEN.csv: verbatimScientificNameWithAuthorship: Set canon_taxonpath_id to 0 on the first, scrubbed taxonpath to auto-create the self reference that indicates a scrubbed taxonpath