minor stitching optimization (use cpu matchers instead of gpu matchers on multicore processors)
minor stitching optimization (use cpu matchers instead of gpu matchers on multicore processors)

opencv/opencv,apavlenko/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv