Assign multiple beds to dupes

[larsonco]

Allow a dupe to have a bed in each planetoid/rocket.

• A rocket-pilot can auto-claim an unclaimed bed in a rocket when they're out at space but still have their old bed when they get back
• Dupes on new asteroids can easily claim a bed in their new home

Alternatively, allow a dupe to auto-claim an empty bed in their new environment (and unclaim their now unreachable bed)

• Same as above, but may prevent bed-clutter from a dupe having too many beds