Update repos math, zk, hash, multiprecision to latest master. Memory access fixed in hashes, lookup argument updates in zk, returning a reference in in-place operators in math, removed ASM code in multiprecision..

Update repos math, zk, hash, multiprecision to latest master. Memory access fixed in hashes, lookup argument updates in zk, returning a reference in in-place operators in math, removed ASM code in multiprecision.. #49