inputs/VegBank/: Added logs

input.Makefile: Staging tables installation: `%/install: %/create.sql`: Log the output to the install log, just like for other %/install targets

vegbien_dest: schemas: Added public explicitly, even though it's already in the default search_path, in order to shadow any datasource's tables of the same name as a VegBIEN table (such as in VegBank). (VegBIEN tables are referenced without a schema, while datasource tables are referenced with a schema, so collisions are not a problem after this fix.)

input.Makefile: Staging tables installation: sql/install: Fixed bug where needed space before \ at end of line, because one is not automatically added in a recipe command (although it's added elsewhere)

sql.py: run_query(): DuplicateException: Also match "of relation" part of error message, so that parsed column name does not contain "of relation"

subtract: Made it case- and punctuation-insensitive

mappings/: Removed no longer needed Veg+.cs-VegBIEN.csv, which is now the same as Veg+-VegBIEN.csv which was derived from it

join: Documented that it's case- and punctuation-insensitive.

bin/map: map_table(): Refactored to map simplified to original column names first and then determine column index for each original name, in order to avoid trying to recover the original name from a simplified name where multiple original names might collide onto the same simplified name. Documented that it's case- and punctuation-insensitive.

intersect, union: Made case- and punctuation-insensitive. mappings/Veg+-VegBIEN.csv: Removed no longer needed duplicate entries for each first letter case, which must now be removed for case- and punctuation-insensitive intersect/union to work. Note that the SpeciesLink `svn diff` hides _alt entry 0, which contains one of the removed duplicate columns that appears in the diff.