WP 4.3 compatibility

In class ColumnsWidget, need to change the constructor to:

function __construct() {
    $widget_ops = array('classname' => 'ColumnsWidget', 'description' => 'Add columns in the presentation page' );
	$control_ops = array('width' => 350, 'height' => 350); // making widget window larger
	parent::__construct('columns_widget', 'Cryout Column', $widget_ops, $control_ops);
	$this->temperas= tempera_get_theme_options(); // reading theme options
  }