I can't find any docs on this but from checking the file these can be
safely ignored.

Import FBX: correct behavior for empty FBX files (no 'Objects' nor 'Connections'  top-level elements).

Fix a bug reported on IRC by mifth (a print was assuming org obj was a mesh...). Also cleaned up another debug print, we do not need those!

More FBX fixes regarding UV/textures, found while investigating a potential issue with mifth on IRC: handling of default empty texture (when there are none real texture to export) was rather fuzzy/inconsistent.

Note: not to be backported, not 100% sure this is now correct, and not a regression anyway.

This situation was simply not handled in existing code. Also removed last use of tessellation (my bad, should have checked this before), and enhanced/cleaned up a bit mat/tex handling.

Grr, another stupid mistake, we always need me.uv_textures, even if we do not actually export textures!

Stupid mistake, vcol was also affected…

* Export polygons instead of tessellated tris/quads.
* Export split vertex normals.
* Better performances (about 20% gain at least with big files), and use much less bytes when exporting UVs/VCol!

fbx import cycles materials - set image mapping from diffuse for other channels that have no mapping set.

Using a bit more flexible way to handle those values (range now from 10^-18 (20) to 10^2 (0) frames). Not sure we shouldn't rather get rid of such "magic" value and let user set frame threshold directly, though!

add check for reading ascii fbx files, was common annoyance that users are unaware that they try to import ascii files.

from Norbert Nopper (mcnopper), with some of my own edits.

- Improved light export
- Improved camera export
- Improved material export
- Improved mesh export. faces can now be either flat or smooth.

- support multiple materials per mesh.
- support multiple UV layers.
- fix but where an extra dummy face would be imported.

- added support for property templates (FBX uses fallback templates so properties can have default values)
- fix but in importing blender-internal material bumpmap.