rusty_erasure 0.4.0

Intel ISA-L's erasure coding, remade with Rust: matrix-flexible GF(2^8) Reed-Solomon encode, incremental update and first-class recovery, plus RAID-6 P+Q. Byte-identical to ISA-L, faster than its AVX2-GFNI assembly, validated parameters instead of undefined behaviour. No C, no NASM, no GPL. MIT OR Apache-2.0.