Function normalize

examples/image_processing/deconvolution.cpp:20–24

const float RELAXATION_FACTOR = 0.05f;

array normalize(const array &in) {
    float mx = max<float>(in.as(f32));
    float mn = min<float>(in.as(f32));
    return (in - mn) / (mx - mn);
}

int main(int argc, char *argv[]) {
    int device = argc > 1 ? atoi(argv[1]) : 0;