to compensate for neon ieee754 non-compliancy.
Also changed the comparison between max valid and calculated distance to
make the error message more accurate (in case curMaxDist == maxDist)

Set it 1 instead of 0.001, as is already done in gaussianBlur3x3. That
will allow integer destination matrices that are not exactly the same,
but very close to the expected result, to pass the test.

NEON speedup: 2.31x
Auto-vect speedup: 2.26x

Test kernel: [-0.9432, -1.1528, 0, 1.1528, 0.9432]

NEON speedup: 2.36x
Auto-vect speedup: 2.36x

Test kernel: [0.1, 0.2408, 0.3184, 0.2408, 0.1]

NEON speedup: 9.46x
Auto-vect speedup: 1x

Test kernel: [-0.9432, -1.1528, 0, 1.1528, 0.9432]

NEON speedup: 8.64x
Auto-vect speedup: 1x

Test kernel: [0.1, 0.2408, 0.3184, 0.2408, 0.1]

NEON speedup: 2.12x
Auto-vect speedup: 1.01x

Test kernel: [-2, 0, 2]

NEON speedup: 3.27x
Auto-vect speedup: 1.01x

NEON speedup: 1.75x
Auto-vect speedup: 1x

NEON speedup: 2.04x
Auto-vect speedup: 1x

NEON speedup: 2.75x
Auto-vect speedup: 1.01x

NEON speedup: 2.66x
Auto-vect speedup: 1x

NEON speedup: 2.95x
Auto-vect speedup: 1x

Test kernel: [-0.9432, -1.1528, 0, 1.1528, 0.9432]

NEON speedup: 1.96x
Auto-vect speedup: 1x

Test kernel: [0.0708, 0.2445, 0.3694, 0.2445, 0.0708]

NEON speedup: 3.14x
Auto-vect speedup: 1.6x

Test kernel: [-5, -2, 0, 2, 5]

NEON speedup: 1.95x
Auto-vect speedup: 1.17x

Test kernel: [-2, 0, 2]

NEON speedup: 1.84x
Auto-vect speedup: 1.2x

NEON speedup: 3.86x
Auto-vect speedup: 1.67x

Test kernel: [0.0708, 0.2445, 0.3694, 0.2445, 0.0708]

NEON speedup: 2.56x
Auto-vect speedup: 1.26x

Test kernel: [1, 3, 1]

NEON speedup: 4.1
Auto-vect speedup: 2.25

It should also be better for optimizing when compiling kernel.
Signed-off-by: Yan Wang <yan.wang@linux.intel.com>

Removed the "FileStorage::FORMAT_XML" to generalize format of the String
model.

highgui: Support to change trackbar count in setTrackbarPos and replaced deprecated CreateToolbarEx in Windows.