Copy and Move with checksum verification

New versions @ https://github.com/hansij66/securecopy

crccp and crcmv are based on coreutils (v8.23) and add crc checksum functionality to cp and mv commands. Checksums can optionally be stored in the file's xattr. The command crcsum can be used for further checksum analysis/verification, or for storing a checksum in the xattr of all files in a directory or filesystem.