public function destroy($id)
 {
     $repayment = Repayment::where('debtor_id', '=', $id);
     $repayment->delete();
     $debtor = Debtor::find($id);
     $debtor->delete();
     Session::flash('message', 'Дебитор удален успешно!');
     //return Redirect::to('debtor');
 }