Capturing now behaves as in C&C3:KW - wait for 8 seconds
outside the structure before running inside and being disposed.
A "Reusable Engineer" lobby option is provided to restore
the previous non-disposing behaviour.
AP minelayer is removed, AT minelayer is made generic and available to both factions. BuildPaletteOrder is pushed up to remove gap.
I didn't remove AP mine from weapons and explosions, because graphics are still there and may be used in future.
