postgres_vegbien: Removed no longer needed retrieval of bien_password

vegbien_dest: Get bien_password by searching relative to $self, which we now have a way to get in a bash script (${BASH_SOURCE⁰}), rather than requiring the caller to set it. Provide usage error if run without initial ".".

input.Makefile: Staging tables: import/install-%: Use new quiet option to determine whether to tee output to terminal. Don't use log option because that's always set to true except in test mode, which doesn't apply to installs.

input.Makefile: Staging tables: import/install-%: Use new quiet option to determine whether to tee output to terminal. Don't use log option because that's always set to true except in test mode, which doesn't apply to installs.

main Makefile: PostgreSQL: Edit /etc/phppgadmin/apache.conf to replace "deny from all" with "allow from all", instead of uncommenting an "allow from all" that may not be there

input.Makefile: Sources: Fixed bug where cat was defined before $(tables), by moving Sources after Existing maps discovery and putting just $(inputFiles) and $(dbExport) from Sources at the beginning of Existing maps discovery

sql.py: Made truncate(), tables(), empty_db() schema-aware. Added qual_name(). tables(): Added option to filter tables by a LIKE pattern.

main Makefile: VegBIEN DB: Install public schema in a separate step, so that it can be dropped without dropping the entire DB (which also contains staging tables that shouldn't be dropped when there is a schema change). Added schemas/install, schemas/uninstall, implicit schemas/reinstall to manage the public schema separately from the rest of the DB. Moved Subdir forwarding to the bottom so overridden targets are not forwarded. README.TXT: Since `make reinstall_db` would drop the entire DB, tell user to run new `make schemas/reinstall` instead to reinstall (main) DB from schema.

schemas/postgresql.Mac.conf: Set unix_socket_directory to the new dir it seems to be using, which is now /tmp

csv2db: Fixed bug where extra columns were not truncated in INSERT mode. Replace empty column names with the column # to avoid errors with CSVs that have trailing ","s, etc.