Fix cnc's nuke not damaging air units (a regression from a recent commit to remove its PerCell damage model)
Add Multiply blend mode for D2K move-flash and shroud.
Move ShroudRenderer into a trait.
New shroud renderer. Fixes #2162. Fixes #3024. Fixes #4034.

Uses the original tile sprites in C&C and D2K and uses a smoother transition in all mods.
Update CHANGELOG.
Merge pull request #4288 from Mailaender/stats-fix

Fix death count in observer stats
Merge pull request #4286 from ScottNZ/bleed

Fix cnc's nuke not damaging air units (a regression from a recent commit...
Merge pull request #4287 from pchote/shroud

Rewrite shroud renderer.
Convert SmudgeLayer to sequences.
Use the original D2K craters.
Update CHANGELOG.
Fix typos spelling in changelog.
Merge pull request #4271 from pchote/smudges

Use original D2K craters.
C4 demolishable bridges
made fields non-explodable