Start approximate LVLH.
Fix LVLH transform. Thanks @rcpage3!
Merge remote-tracking branch 'origin/master' into approximateLVLH
Default to east-north-up frame if LVLH fails.
Clean up some allocations.
Updates based on review.
Update CHANGES
Merge pull request #818 from AnalyticalGraphicsInc/approximateLVLH

Approximate LVLH