add sigma param to gaussianBlur
add sigma param to gaussianBlur

madshall/node-opencv,peterbraden/node-opencv,piercus/node-opencv,madshall/node-opencv,akshonesports/node-opencv,madshall/node-opencv,piercus/node-opencv,piercus/node-opencv,madshall/node-opencv,peterbraden/node-opencv,peterbraden/node-opencv,akshonesports/node-opencv,akshonesports/node-opencv,akshonesports/node-opencv,madshall/node-opencv,akshonesports/node-opencv,akshonesports/node-opencv,piercus/node-opencv,madshall/node-opencv,peterbraden/node-opencv,akshonesports/node-opencv,piercus/node-opencv,piercus/node-opencv