strings.py: json_encode(): Fixed bug where '\n' and '\r' also needed to be encoded

tnrs.py: repeated_tnrs_request(): Also retry request in debug mode if an HTTPError is thrown, so that debugging info can also be obtained if there is a bug in the TNRS client

tnrs_db: Updated query for new three-level taxonpath hierarchy, where the concatenated name is now stored in identifyingtaxonomicname instead of taxonomicnamewithauthor

root map: Removed no longer needed public schema override, which is now handled by vegbien_dest

vegbien_dest: Allow user to specify a custom public schema in the $public env var. This makes custom public schema functionality available to all VegBIEN-accessing scripts, not just map.

tnrs_db: Adjusted pause, max_pause so the daemon waits longer before exiting, because after the initial TNRS run, most names have already been scrubbed and new names may not be added until the end of the import (in the case of a very large new datasource)

input.Makefile: Staging tables installation: Added cleanup, %/cleanup to clean up already-installed tables

tnrs.py: encode(): Also prepend special padding string to empty and whitespace-only strings because these names are otherwise ignored by TNRS (no response row)

tnrs_db: pause: Increased to 30 min because if no new names are available in TNRS.tnrs, there is no need to check every minute for new names (which clutters up the log file output). The pause feature is designed to allow tnrs_db to run in parallel with the import process, and process new names as they are made available, which only happens once for each partition of each datasource.

tnrs_db: Fixed bug where the new filtering out of already-scrubbed names caused names to be skipped, because the loop would both advance by the number of rows found and those rows would no longer be returned by the query, causing only every other set of rows to be processed