Noteworthy changes:
- [ODS/XLSX] Big performance improvement, mostly related to how Styling is done (thanks @alamirault!)
- [XLSX] Support for strict OOXML
Fixes:
- [ALL] Headers setting now follows RFC6266
- [ODS/XLSX] Floats are no longer stored as locale dependent
- [XLSX] Spout now supports inline strings with multiple value nodes
- [XLSX] Fixed skipped cells that were possibly in the wrong order