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.

streams.py: StreamIter: Define readline() as a separate method so it can be overridden, and all calls to self.next() will use the overridden readline(). This fixes a bug in ProgressInputStream where incremental counts would not be displayed and it would end with "not all input read" if the StreamIter interface was used instead of readline().

csv2db: Fall back to manually inserting each row (autodetecting the encoding for each field) if COPY FROM doesn't work

streams.py: FilterStream: Inherit from StreamIter so that all descendants automatically have StreamIter functionality

sql.py: insert(): Support using the default value for columns designated with the special value sql.default

sql.py: insert(): Support rows that are just a list of values, with no columns. Support already-escaped table names.

strings.py: Added contains_any()

csvs.py: reader_and_header(): Use make_reader()