Add help text (submission guidelines) when creating a node via profile page

I noticed that when you have help text for the nodeprofile node type, it only shows up on the node/add page.

This patch adds the appropriate help info to /user/[uid]/edit/[node_type] by invoking hook_help.

function nodeprofile_help($section) {
  if (arg(0) == 'user' && arg(2) == 'edit' && $type = arg(3)) {
    $type = node_get_types('type', str_replace('-', '_', arg(3)));
    return '<p>'. filter_xss_admin($type->help) .'</p>';
  }
}