Add support for Core Number Field

Just wanted to know if there was a specific reason why modules supports the text and image fields, but not the number field. I wanted to add Microdata for the prepTime and cookTime properties as specified at http://schema.org/Recipe and was using a number_integer field. I wrote a simple hook_field_info_alter to add support for this field type and it seems to be working just fine:

/**
* Implements hook_field_info_alter().
*/
function d7dev_field_info_alter(&$info)
{
   $info["number_integer"]["microdata"] = TRUE;
}