Fixes: http://code.google.com/p/zfdatagrid/issues/detail?id=230
Fixes: http://code.google.com/p/zfdatagrid/issues/detail?id=230

When setting extra columns you can now specify the title. The name option must be always set and unique. title must be a string. If the option title is not set, option name will be used for column title

Ex:
$left = new Bvb_Grid_Extra_Column();
$left->position('left')->name('Left')->title('')->decorator("<input  type='checkbox' name='number[]'>");
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