* Added INNER JOIN
* Added Exception on invalid column names in join condition
* Fix CodeMirror getSelection in demo.php
* Added "RESET DATABASE" button in demo.php
* Implemented LIKE operator in WHERE clause
* Added loggin for SQL queries in demo application
* TIMESTAMP data type
* DEFAULT CURRENT_TIMESTAMP on datetime and timestamp types
* Added datetime functions now(), current_timestamp(), dayofmonth, dayofweek, dayofyear