Green Mountain Coffee Roasters (GMCR) has been one of the big winners in the recent rally, showing strong earnings growth and outstanding stock performance. The Vermont-based company is leading a revolution in the way coffee drinkers drink. The company's Keurig unit makes K-Cups that allow consumers to brew a single-serve cup of coffee at home or work. The idea is catching on and, analysts say, is the engine of the company's growth. Green Mountain