Shoppers who are looking for something sparkly to put under the Christmas tree can skip the jewelry and go straight to the source: an ATM that dispenses shiny 24-carat gold bars and coins. A German company planned to install the machine today at an upscale mall in Boca Raton, a South Florida paradise of palm trees, pink buildings and wealthy retirees.  The CEO of Ex Oriente Lux and inventor of the Gold to Go machines, says the majority of buyers will be walk-ups enamored by the novelty. But he says they're also convenient for more serious investors looking to bypass the hassle of buying gold at pawn shops and over the Internet.