update assimp lib

Engine/lib/assimp/test/models/ASE/ref/README.md

@@ -0,0 +1,18 @@
+# ASE 3D model reference images
+
+## MotionCaptureROM.ase
+
+### Model is pure node animation of separate rigid meshes, no bones/mesh deformation
+Note: this model has no bones/skeleton; the body is formed of separate rigid meshes
+for each segment (e.g. upper arm, lower arm, upper leg, lower leg are all separate meshses) 
+and animation  is entirely driven by changing node transformations over the animation timeline, 
+rather than deforming vertices via bones and associated weights.
+
+### Artifacts
+Animation has known artifacts, as stated in [MotionCaptureROM.source.txt](../MotionCaptureROM.source.txt):
+```
+NOTE: The errors in the middle of the animation are caused by problems during recording,
+it's not an importer issue.
+```
+
+<img alt="MotionCaptureROM.ase" src="screenshots/MotionCaptureROM_ase.gif" width=320 />