- applied patch to fix compilation errors with CLang following issue #3590305

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1339 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
- Ifc: fix lost line that causes compile errors in debug build, WIP work on removing overlapping window caps.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1340 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
Matrix to Quaternion conversion precision fix.

See below links for reasoning, but in short, avoid sqrt and division
of small values. It's also possible to normalize the quaternion after
the conversion, but better precision is preferable.

http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm
http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/ethan.htm
ColladaParser: Tolerate empty data arrays and controller weights.
- triangulation: re-introduce special handling for quads, now with proper support for concave quads. This should *really* fix [3429812], but it leaves me to suspect bugs in the general-purpose triangulation code for ngons.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1341 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
fixed sample.py
Fixed pyassimp core.py
Merge github.com:rodrigob/assimp
- copy&paste error in aiColor3D::operator-  apparently nobody's using these. Thanks to Robin Tucker for pointing this out

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1342 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
- fixed compilation error on GCC in IFC loader. Thanks to larsp for the report!

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1343 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
Fixing compilation on gcc 4.5.2
Merge git://github.com/assimp/assimp
bugfix : Fix a memory leak in the obj-loader.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1344 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
- Ifc: vastly improved algorithm for fixing up window caps.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1345 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
- fixed preprocessor checks for some importers
- fixed warning about shadowing variables in quaternion.h


git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1346 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
update : add displacement map support to obj-material importer. this feature is supported by some special exporters.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1347 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
Merge pull request #13 from rodrigob/master

Fixes to pyassimp
Merge pull request #12 from ccxvii/master

Precision fix and Collada robustness fix.