sql.py: put_table(): Renamed temp_prefix param to into and allow it to be a sql_gen.Table object. Use into directly as the pkeys table, and make its default value be `out_table.name+'_pkeys'`.

db_xml.py: put_table(): Pass custom temp_prefix to sql.put_table() for relational funcs, so that their value param's input column name is included in the temp table name

sql.py: put_table(): Added optional param temp_prefix for the prefix of generated temp tables

sql.py: put_table(): Made debug messages more self-documenting

sql.py: put_table(): Changed "Setting missing rows' pkeys to NULL" to "Setting pkeys of missing rows to NULL" to avoid having single quote in debug output, which messes up text editor SQL syntax highlighting

sql.py: Parsed exceptions: Use strings.as_tt() to format Python values

strings.py: Split as_table() into as_table() and as_inline_table() depending on whether the table needs to be inlined in an ordered list item or not

strings.py: Split as_table() into as_table() and as_inline_table() depending on whether the table needs to be inlined in an ordered list item or not

strings.py: as_table(): Changed to use

 formatting because Redmine tables can't be embedded in ordered lists without restarting the numbering

strings.py: as_table(): Fixed bug where table was not ended properly, by adding a space after the last \n and having rstrip() string only newlines