Adds -key (encryption), show, sha1, sha256 commands. Updates libzpaq to v6.43 (adds AES, SHA256, Scrypt)
Adds encrypt command, removes restore, show, sha1, sha256, changes extract to skip existing files instead of error, changes purge syntax, prompt for passwords without echo, faster -method 5, some minor bug fixes.
Improves compression by sorting files by case insensitive extension, then by decreasing size rounded to 16K. Fixed VC++ compile error in 6.44.
Improved compare, added -fragment option. Fixed extracting streaming encrypted archives.
Adds snip command to support remote backups. Extends -since to extract and compare. Increased compression buffers for better core utilization.
Adds join command. Renames snip to split. Optimized decoder in libzpaq.cpp 6.48.