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)

sql_io.py: put_table(): Creating full_in_table: If out_table is a SQL function, just use in_table because in_table is not modified

input.Makefile: Documentation: import/steps.by_col.sql: $(steps): Fixed bug where stderr needed to be redirected to stdout so that it would be passed to debug2redmine and included in the file

root Makefile: Datasources: import: Don't pause after "To import all inputs at once" message because this prevents running sequential import with & (as `make import &`)

sql.py: create_table(): Only version temp tables, so that e.g. staging tables are not created with a version # if they already exist. This will help make `make install` idempotent.

input.Makefile: Import to VegBIEN: $(import): Only redirect stderr to stdout if outputting to a log file. This allows unlogged imports to redirect the "Inserted # new rows into database" message, which is output to stdout rather than stderr for use by validation and automated testing, to a separate location.

README.TXT: Documented how to remove an archived import. Moved archived imports commands from Data import to new section Maintenance of archived imports. Changed "Empty the DB" to "Remove the last import" for clarity, and made the command apply just to the public schema and not also to the functions schemas (reinstalling those is documented under Schema changes).