Changes for version 0.22
- Major Added Format.pm and the facility for cell formatting.
- Spreadsheet::BIFFwriter - Abstract base class for Excel workbooks and worksheets.
- Spreadsheet::Format - Class for defining Excel formatting.
- Spreadsheet::OLEwriter - Writes BIFF data into a OLE compound storage file.
- Spreadsheet::Workbook - A writer class for Excel Workbooks.
- Spreadsheet::Worksheet - A writer class for Excel Worksheets.
- Spreadsheet::WriteExcel - Write formatted text and numbers to a cross-platform Excel binary file.