Combine all maps into one

Combine all 5 current maps into one massive map that players can freely travel across. Allow players to have 5 active bases across the map, one in each region (Drucker, Providence, etc). Don't change outposts or how they work. Game engine may not be able to handle 12 survivors at each base, so leaving pop-cap at 12 may work but the player could assign survivors to remain at a specific base for defense.