[New Feature] Building rubble graphic using a custom palette.

[MikillRosen]

Description:

For some reason, Building rubble graphics use the iso palettes which, in my opinion, is inefficient because you would have to copy the building SHP in all theater MIXes (You could make mistakes in this process like Westwood Studios) for the rubble to look right in all theaters when using a palette like unit could've lessened the copying and allow the rubble to be used in General MIX files like genermd.mix and isogenmd.mix

Possible Implementation:

In artmd.ini

[SomeBuildingType]
RubblePalette=unit; A palette's file name without the theater suffix and file extension.

[secsome]

I suppose this feature requires implementation of PalettesManager
Releated Address: 47F629
Just hack this palette is enough