Fix world visibility checks when shroud is disabled.
Introduce IRenderable.IsDecoration and AsDecoration.

These are used to filter *Renderables that shouldn't
be copied for things like highlight or shadow.
Parse sequence ZOffsets as a WRange.
Fix parsing of negative WRange.
Increases contrast between main snow color and darker patches of snow, additionally gives the darker patches a slightly more blueish color.
Remove BelowUnits from C&C bibbed structures.

It interacts badly with the rewritten Bib trait.
Remove BelowUnits from D2K.
Remove BelowUnits from RA bibbed structures and crates.
Remove BibLayer and use sequences / RenderSprites instead.
Replace IOrderGenerator.RenderBeforeWorld with world-sorted .Render.

Range circles have been moved to RenderAfterWorld for now.
Remove obsolete ITooltip.Stance.
Add IMove interface.

Fixes Rallypoints for aircraft.
Merge pull request #3663 from reaperrr/cnc-snow-color-fix

C&C mod snow brightness fix
Fix z-ordering of FrozenActorProxy.
Fix z-offset for muzzle flashes. Fixes #3667.
Hide CashTicks under fog. Fixes #3664.
Quick and esy way to get the hash of map files using OpenRA.Utility
Don't flash bibs when targeting buildings.
Merge pull request #3668 from pchote/more-polish

Polish fixes for muzzle flashes and cash ticks.
Merge pull request #3665 from pchote/frozen-fog-prereqs

Rework bibs (again).