Add cache and query for ArticulatedObject global scaling.

[aclegg3]

Motivation and Context

Articulated objects can be programmatically scaled upon instantiation in the scene. Any geometric metadata defined in the original frame should be scaled also, requiring that this global scale is cached when the object is created and queryable later.

How Has This Been Tested

Added a simple test in python.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have completed my CLA (see CONTRIBUTING)
• I have added tests to cover my changes.
• All new and existing tests passed.

[jturner65]

LGTM. How did I miss this? :)

[Skylion007]

Forcing requirements because of wheel dependencies is a silly and if you HAVE to do it, then use the magic python version comments.

[aclegg3]

Thanks for the pip magic.

Changes addressed.