Adds support for HeadingPairs and TitlesOfParts XLS file tags.
Features
- New callback event/mechanism notifies you of conversion progress.
- Added support more views.
- Added support for reading a single table cell in XLS files.
- Improved shape grouping.
- Added support for HeadingPairs and TitlesOfParts XLS file tags.
- Improved CalculateFormula.