Allow binding arrays for IN() clauses

[tomwalder]

This is likely to be a self-implemented implode() with escape() calls

Possible usages:

• $stmt->bindArray('ids', array(1, 2, 3));
• $stmt->bindIntArray('ids', array(1, 2, 3));
• $stmt->bindStringArray('ids', array('one', 'two', 'three'));

[tomwalder]

Alternative usage - using existing methods

• $stmt->bindInt('ids', array(1, 2, 3));
• $stmt->bindString('ids', array(1, 2, 3));

And we auto-detect array inputs