pg_dump_vegbien: Use SET SESSION AUTHORIZATION to ensure that owners are always recorded in the same format. This will help make plain text backups comparable using diff.

backups/Makefile: Backups: Fixed bug where `%.sql: %` needed to come before %.sql with no prerequisites to be matched first

Moved archived imports and make targets to maintain them to new backups dir

Moved archived imports and make targets to maintain them to new backups dir

Added psql_script_vegbien

root Makefile: VegBIEN DB: Schemas: Added schemas/%.sql to extract a compressed custom-format backup to plain SQL

root Makefile: VegBIEN DB: Schemas: Added schemas/%.backup/uninstall so that a schema can be removed by its backup file name (with extension) as well as its name

README.TXT: Documented that files and directories can easily be remade with `make <file>-remake` and `make <dir>/remake`, which do the make clean or rm automatically

pg_dump_vegbien: Added plain env var which creates plain text output instead, for use in debugging and validation

input.Makefile: Mapping: $(map): Fixed bug where use_staged was causing in_schema, in_database, etc. to be set even when not outputting to vegbien, causing bin/map to try to output to a DB when it should output to stdout, by moving the use_staged test to $(map2db)