v8.0.0

What's new since 7.0.0

• many optimizations.
• bump libraries.
• remove '\' if in the filename to avoid overwriting in special directories.
• improve performance: use buffering instead of old reading-writing implementation. (In short: BufWriter/BufReader.)
• encrypt in parallel.
• add --threads CLI argument for controlling the amount of threads for encrypting in parallel.
• add --checksum CLI argument for adding the check of comparing checksums at the end. By default this behavior is disabled.

Full Changelog: 7.0.0...8.0.0