 PLYImporter: - optimize memory and speed on ply importer / change parser to use a file stream - manage texture path in ply import - manage texture coords on faces in ply import - correction on point cloud faces generation
 PLYImporter: - optimize memory and speed on ply importer / change parser to use a file stream - manage texture path in ply import - manage texture coords on faces in ply import - correction on point cloud faces generation

IFC :
 - update poly2tri to avoid crash on some IFC files

Collada :
 - manage missing texture reference in collada import

 https://github.com/assimp/assimp/commit/f84851e8931fb04e7074d487c91c3b3faa566994#diff-3a6ce96c249b071810692096c414d4b0

java-graphics/assimp,elect86/jAssimp