sql.py: clean_name(): Convert names to lowercase so that PostgreSQL will behave the same whether the name is escaped with "" or not. This will help avoid bugs in code that uses temp tables created by the sql module.

sql.py: put_table(): Added order_by=None wherever rows were not supposed to be re-ordered. On DuplicateKeyException: Save existing pkeys in temp table for joining on.

db_xml.py: put_table(): Pass limit and start to sql.put_table()

db_xml.py: put_table(): Added limit and start options

sql.py: When creating a temporary entity (table, function, etc.), instead create it as a permanent entity in debug mode so it can be viewed after the program is run

sql.py: DbConn: Store whether in debug mode (log_debug != log_debug_none) for easy use by methods

bin/map: connect_db(): Turn on autocommit mode in debug mode if commit is on, so that incremental results can be seen in the DB

sql.py: DbConn: Use internal autocommit handling instead of DB connection autocommit attr to avoid autocommits inside a savepoint

sql.py: DbConn: Added autocommit option to turn on autocommit mode. Use set_session() instead of SQL command to set isolation level.

sql.py: mk_insert_select(): embeddable: Fixed bug where the function may do different things when run, because the function (and other statements whose cached strings depend on the function name) may be run after the function definition would have changed, by versioning the function name and using CREATE FUNCTION instead of CREATE OR REPLACE FUNCTION so that its definition never changes