File 01 :
- Check the presence of (&) character in the content (bug during import)

File 02 :
- New way to define custom fields (via CDATA, not documented by TestLink but works fine)
- Add the ability to import a XML file exported from TestLink to modify Testcase content. TC# is renamed "External ID" and is more specific
- Bug correction : values in a hidden column are now used during XML generation
File 03 :
- Correction Bug #1 (prefix). Available since TL 1.9.11 only (bug TL #6314)
- Improve user experience