What's better than a dividend? A dividend that's growing.Income investors don't have to settle for dividends that tread water. There are plenty of stocks to buy that offer growing dividends and are poised to keep the momentum going along with attractive dividend yields.Three Motley Fool contributors think they've found ideal dividend growth stocks to buy and hold. Here's why they picked AbbVie (ABBV 0.22%), Amgen (AMGN 1.77%), and Gilead Sciences (GILD -0.01%).Keeping a 52-year streak goingKeith Speights (A ...