Green Mountain Coffee just reported earnings which beat expectations. The street expected EPS of $0.48 versus reported earnings per share of $0.64. Net sales rose to $947 million from $712 million in the prior year. Shares of Green Mountain Coffee Roasters Inc. (NASDAQ:GMCR) are soaring on the news, up over 25% in after hours trading. GMCR is a favorite of short sellers, including one of the most famous ones, David Einhorn of Greenlight Capital. We spoke to some shorts and they believe that Green Mountain Coffee Roasters Inc. (NASDAQ:GMCR) beat estimates based on increasing inventory. They also noted that 40% of outstanding shares are held…