Limitations to transforms

[martinweismann]

In general:
Are there any limitations to the transformation matrices? Negative determinant? Skew? Non-zero determinant?

extracted from #42

[martinweismann]

Resolution:
https://github.com/3MFConsortium/spec_volumetric/blob/develop/3MF%20Volumetric%20Extension.md#5241-property-element

Steps ahead:

• create test files with non-rigid body transformations in the build-component-object-hierarchy
• create test files with non-rigid body transformations in the evaluation of the graph of fields.
  to make sure the specified behavior is sensible.