Spawnpoints.

- Changes latejoin to use datums instead of hardcoded arrivals shuttle.
- Adds landmarks and global lists for cryo and gateway latejoin spawning.
- Adds character preferences/savefile option for spawn point.

Gateway is commented out because Ravensdale is a butt, but I am hoping he lets me uncomment it sometime because I love the sprite and want it to be used.
What about "has woken from cryogenic stasis?"  I dunno, clocked in sounds funny to me for some reason, even though I know what it means.