Modifying the Run-length representation of  Gradient fields used in 3D\4D registration to make more efficient use of memory and allocating and individual buffer for each image line  instead of one large buffer for the whole image.  This should substantially reduce stress on the memory allocation system.

Achieved further improvement of speed in URAL-Registration core procedure (affects 3D\4D).  This was done by further employin INTEL AVX intrinsics (128-bit vectorization commands).