The API has changed quite a bit, so lots of changes had to be made in the osg readerwriter. The preious version of the FBX SDK (2013.3) already deprecated a lot of the names and functions. The code I submit now still compiles against 2013.3 (possibly needs a #define FBX_NEW_API). Not sure if that's useful, but it might ease the transition."
A problem with transparency has also been fixed: objects were transparent wrt themselves but were opaque wrt to other objects.
Finally I added the support for "mixing factors" of diffuse, reflective and opacity textures/values.
From Michael Platings: added "LightmapTextures" plugin option that changes the way textures are interpreted so Alessandro's models appear correctly. Also refactored to put many functions in one class to avoid passing around too many arguments to functions.