Adds a cell to the default list.

Usage:
	php cell_page_default.php <url> [options]

	<url>: A /module/controller string where a specific module or controller can be specified
	       or 'default' any specified action is ignored (see cell_add.php)
	[options]: Set options for the page

	           -cell=<id>    Sets the cell ID
	           -target=<zone>      Sets the desired destination of the cell (usually 'default' or 'cells')
	           -sort_order=<num>   Sets the desired order of the cell
Example:
	A global default cell
	php cell_page_default.php /default/default -cell=110 -target=cells

	A cell which is global for the news controller
	php cell_page_default.php /default/news -cell=111 -sort_order=2