AUTHORS
ICustomBuild for separating WithMakeAnimation logic from Building and allowing other custom build traits
Migrated LineBuild logic to ICustomBuild adding ICustomBuildLayout and added SegmentType.

LineBuild.SegmentType selects a different actor for the intermediate segments,
useful for Laser Fences and Firesorm Barrier.
Also moved some utility functions to BuildingInfo & LineBuildInfo that relied on them.