added a "highpass" faster method (idea authot - Timothy Lottes), fixed array memory overrun, added file output(s)
added a "highpass" faster method (idea authot - Timothy Lottes), fixed array memory overrun, added file output(s)

pixelmager/BlueNoiseGenerator,bartwronski/BlueNoiseGenerator,bartwronski/BlueNoiseGenerator,pixelmager/BlueNoiseGenerator,bartwronski/BlueNoiseGenerator,pixelmager/BlueNoiseGenerator