Conversion tools

[PiBoSo]

The conversion tools have been moved to a separate download: https://www.kartracing-pro.com/?page=downloads

Changelog
fbx2edf:
- added support for skinned models
- added support for animations

[PiBoSo]

Conversion tools updated to fix the tangent space generation of very small triangles:
https://www.kartracing-pro.com/?page=downloads

[PiBoSo]

Conversion tools updated to add the possibility to append EDF files even without a script file:
https://www.kartracing-pro.com/?page=downloads