ZUC does not use any constant time lookup functions,
so it should not be in the list of algorithms depending on
these functions in README.

- Added AES-ECB to man page recommendations
- Minor fix in README recommendations table

Now that there is an SSE and an AVX implementation,
there is no need to have an scalar implementation for Chacha20.

Initial Chacha20 AVX512 implementation done using XMM registers
only, handling only 64 bytes at a time.

Add N buffer functions for ZUC EEA3/EIA3,
which utilize the internal ZUC functions using
GFNI and VAES instructions.

Optimize ZUC internal functions by using the upcoming
GFNI/VAES instructions, alongside AVX512.

Due to the usage of the new GFNI instructions,
the minimum required version of NASM has been updated
from 2.13.03 to 2.14.