Fix 3DS instances loading, fixes #151
[FBX] Do not rename nodes if they are marked as null in fbx. Preserve this information in node metadata.

Use can use node.Metadata.Get("IsNull") to check. (returns "true" or "false")
fix miss commit at 8e35ea59d520a3449793e50f678af3a14b8cd140
Merge pull request #228 from YoheiKakiuchi/fix_ply_bug

fix miss commit at 8e35ea59d520a3449793e50f678af3a14b8cd140
Merge pull request #224 from VirusFree/master

[FBX] Do not rename null nodes. Preserve information in node metadata.
bugfix:
add handling for special cases for the uv-calculation:
- When 3 vector have same UV, using default UV direction:
- When 2 vector have same UV, recalculate tangent/bitangent according to normal and bitangent/tangent.

Thanks to Ya ping Jin.

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>
bugfix: install_name should be set to absolute path to installed library in macosx build #226

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>
Merge pull request #217 from lousyphreak/master

Fix 3DS instances loading, fixes #151
Added unparsed FBX properties to the aiNode's metadata. This allows the
user to extract extra/custom/user attributes/properties from the scene
graph. E.g., extracting attributes set under "extra attributes" in Maya.
Fixed a compile error due to a >> expression in a nested template statement.
for python binding to work on mac

add dylib to ext_whitelist for posix system
Merge pull request #232 from autosquid/master

for python binding to work on mac '.dylib'  should be added to ext_whitelist
Merge pull request #231 from frederikaalund/master

Added unparsed FBX properties to the aiNode's metadata.
Added support for heterogenous metadata on the aiNodes.
Fixed a compile error involving unnecessary enum resolution qualification.
Deprecated some abstraction and fixed a memory leak.
Added a convenience overload for aiMetadata::Get using std::string as key.
Refactored the metadata for inner consistency.
saves value in the 'Ke'-Attribute in ObjMtl Files in COLOR_EMISSIVE
Merge pull request #239 from judithhartmann/master

Load and save Ke-Value of mtl-Files