sql.py: Added drop() and use it in drop_table()

debug2redmine: Remove profiling information from the logging output

sql.py: DbConn.run_query(): Only print notices in debug mode, because they are output with a log level higher than the debug verbosity threshold, and this avoid unnecessary overhead

sql.py: DbConn: Added profile_row_ct setting, which is passed to profiler.stop() in run_query()

bin/map: Logging: Raised debug-mode verbosity threshold to 1.5 so that in row-based imports, which have a default verbosity of 1.1, sql.DbConn.run_query() will not profile the query, to avoid unnecessary overhead

sql.py: DbConn.run_query(): Only profile queries in debug mode, to avoid unnecessary overhead when the run time will not be displayed

sql.py: DbConn.run_query(): Profile using the profiling.ItersProfiler class, which pretty-prints the run time

sql.py: DbConn.run_query(): Added profiling of query execution, which is logged with the query

sql.py: DbConn.run_query(): Move log_msg() to where it's used, so that it runs after the query is run and can refer to profiling variables

sql.py: DbConn.run_query(): Use else blocks to avoid applying exception handling to commands run after the main command