Linux packaging fixes.
Keep MessageBox in sync with OverlayEditor's version.
Updated Mac DSFTool.
Drop support for lines. Separate light color from material color.
Define equality for Point class and make hashable.
Name library objects lacking a friendly name after the BGL file that defines them.
Preserve modification times on copied resources.
Fix for texture used with multiple materials in FSX MDL.
Rationalised Object class to use new Material and Texture classes. Refactored to use it.
Emulate billboarding with double-sided objects and upward normals.
Increased LOD calculation and set minimum LOD value.
Fixes for tessellated ground polygons.
Try to avoid making polygons out of fragments of FS2002-style objects.
Correct for rounding errors in DSFTool.
Re-work layer mapping to be more FSX compliant (but less FS9 compliant).
Stop excluding facility data.