Pinching events prevented during threshold constraint

[frankayars]

Pinching will stop sending "pinching" events while the difference between fingers is within the range -10 and 10.

_capturePinch = function() {
var diff, distance;
distance = parseInt(_distance(CURRENT_TOUCH), 10);
diff = GESTURE.initial_distance - distance;
if (Math.abs(diff) > 10) {
GESTURE.distance_difference = diff;
return _trigger("pinching", {
distance: diff
});
}
};

This logic is useful to initially determine a "pinching" threshold but causes issues when users pinches in/out (without lifting from the pinch gesture) and reaches the threshold.