Minor optimizations and corrections in 7z.
Endianness fixes in Blake and Keccak.
Set FMT_UNICODE in 7z formats, so we don't produce false negatives.
Merge branch 'bleeding-jumbo' into memdbg

* bleeding-jumbo:
  Set FMT_UNICODE in 7z formats, so we don't produce false negatives.
  Endianness fixes in Blake and Keccak.
  Minor optimizations and corrections in 7z.