Getters for gyroscope in DVParallaxView

DVParallaxViewGyroGetters.m

-(CADisplayLink *)displayLink {
    if (!_displayLink) {
        _displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(displayLinkHandler)];
    }
    
    return _displayLink;
}

-(CMMotionManager *)motionManager {
    if (!_motionManager) {
        _motionManager = [[CMMotionManager alloc] init];
        _motionManager.deviceMotionUpdateInterval = 0.03f;
    }
    
    return _motionManager;
}