schemas/postgresql.Mac.conf: Set unix_socket_directory to the appropriate Mac OS X dir, since otherwise, the socket is apparently not created and `make reinstall_db` doesn't work

main Makefile: VegBIEN DB: db: Set LC_COLLATE and LC_CTYPE explicitly, to make it easier to change them

Added ProgressInputStream

exc.py: print_ex(): Added plain option to leave out traceback

main Makefile: VegBIEN DB: db: Use template0 to allow encodings other than UTF-8. Because template0 doesn't have plpgsql on PostgreSQL before 9.x, add "CREATE PROCEDURAL LANGUAGE plpgsql;" manually in schemas/vegbien.sql.make, and filter it back out on PostgreSQL after 9.x using db_dump_localize.

PostgreSQL-MySQL.csv: Remove "CREATE PROCEDURAL LANGUAGE" statements

Added db_dump_localize to translate a PostgreSQL DB dump for the local server's version

Added db_dump_localize to translate a PostgreSQL DB dump for the local server's version

vegbien_dest: Added option to override the prefix of the created vars

schemas/vegbien.sql.make: Fixed bug where data sources' schemas were also exported by exporting only the public schema. Note that this also removes the "CREATE OR REPLACE PROCEDURAL LANGUAGE plpgsql" statement, so that it doesn't have to be filtered out with `grep -v`.