Added actual calculation for the integral image in the function 'ufd_integralImage' using cumulative sums
Added actual calculation for the integral image in the function 'ufd_integralImage' using cumulative sums

aldebaro/ufpa-face-detection,brunoricardojava/ufpa-face-detection,brunoricardojava/ufpa-face-detection,aldebaro/ufpa-face-detection