Fix wrong scaling when child object has the same material as parent
Do not create additional file links when child's name comes before parent's in the alphabet
Fix indentation
Copy test .blend/.ls3 files to temp directory only once per test
Correctly write rotation of linked files (YXZ order)
Rename sub -> subset to avoid confusing variable names
Use YXZ axis order when getting rotation for linked files
Rename assertRotation -> assertXYZW
Add name property to Ls3Subset class