What's new:
- Bug fix: some non-ascii characters like “ would prevent Dangerzone from working (issue #144)
- Bug fix: error where Dangerzone would show "permission denied: '/tmp/input_file'" (issue #157)
- Bug fix: remove containers after use, enabling Dangerzone to run after 1000+ converted docs (issue #197)
- Security: limit container capabilities, run in container as non-root and limit privilege escalation (issue #169)