Gold and silver prices ended the first week of the year nearly flat after four sessions of intense volatility rocked by the fiscal cliff deal, the dollar rallying from its lows and worries that the Federal Reserve will end quantitative easing sooner than expected. SPDR Gold Shares (GLD), tracking a 10th of an ounce of bullion, closed the week down 0.06% at 160.44, slightly below its 200-day moving average. Market Vectors Gold Miners ETF (GDX) eked