Start approximate LVLH.
Fix LVLH transform. Thanks @rcpage3!
Replace pseudo-private functions with file-scoped functions
Default to east-north-up frame if LVLH fails.
Clean up some allocations.
Replace pseudo-private functions with file-scoped functions
Updates based on review.
Fix example code in CHANGES.md.

Must be indented with a multiple of 4 spaces to be rendered correctly.
Replace pseudo-private functions with file-scoped functions
Update CHANGES
Replace pseudo-private functions with file-scoped functions
Replace pseudo-private functions with file-scoped functions
Replace pseudo-private functions with file-scoped functions
Replace pseudo-private functions with file-scoped functions
Replace pseudo-private functions with file-scoped functions
Replace pseudo-private functions with file-scoped functions
Merge branch 'batching' into wallGeometry
Updates after review.
Update wall Sandcastle example and add temporary wall to CesiumViewer for testing.