Fix handling of /limit refinement in DECOMPRESS
Fix CRC32 calculation & verification in DECOMPRESS/gzip
Merge pull request rebol/r3#98 (cyphre/decompress-crc32-fix) into community

* cyphre/decompress-crc32-fix:
  Fix CRC32 calculation & verification in DECOMPRESS/gzip
  Fix handling of /limit refinement in DECOMPRESS