Louisville-area bargain hunters endured the cold rain and snow showers to get an early start on Black Friday holiday shopping.In some cases, the sales didn't begin on Black Friday, but the night before as several retailers had late Thanksgiving hours. Other stores and malls opened their doors as early as midnight, with hundreds of people waiting in line to grab sale items.Black Friday has become the traditional start of the holiday shopping season.Analysts say it appears more shoppers are not only buying gifts for others, but something for themselves, an encouraging sign that the economy is improving.