Orealia's Double track to Asheville

This mods adds a second mainline which runs parralel to the original mainline.

It give single track station a second track.

It has a built in progression:

Phase 1: Beta & Addie

Phase 2: Addie to Balsam

Phase 3: Balsam to Hazelwood

Phase 4: Hazelwood to Canton

Phase 5: Canton to Enka

Phase 6: Enka to Asheville

Signals will be added later on once I figured out how to make them