Comment to meta

Hi again!
Please, commit this. This will create comments from columns info.
  'fieldMeta' => 
  array (
    'surname' => 
    array (
      'comment' => 'Users Surname', // Here
      'dbtype' => 'varchar',
      'precision' => '255',
      'phptype' => 'string',
      'null' => false,
    ),