Adds support for XLT, XLTX and XLTM formats.
Features
- Added support for Microsoft Excel XLT, XLTX and XLTM formats.
- Added new functionality for image representation of all the formats except Diagram and Text.
- Added new functionality for text splitting by line number.
- Expanded existing Document Handler Join method.
- Implemented a new formats: TSV and LaTex.
- Expanded logic of document split functionality.