- Improve hash calculation (suggested by @StanislavNikolov)
- Add "verify_passwd" and "verify_integrity" option (@jeffli678)
- Make _packUserEditAtom spec-compliant
- Update _makekey in rc4_cryptoapi (@doracpphp)
- Fix handling of optional field value in ppt97
- Add tests for is_encrypted() (--test)
- Make Doc97File.is_encrypted() return boolean