Allow martians to wear masks

[Roomba]

Joined as an ambassador martian a few rounds ago. A fireball-spamming wiz had breached walls all over the place, resulting in a largely airless station. Because martians can't wear masks, they have no way of setting internals or wearing a spacesuit, so moving about the station involved a several minute frozen slog from air pocket to air pocket.

Martians should, at the very least, be able to wear masks so that they can set internals. Maybe even give them the ling's immunity to the cold of space + no need to breathe if you're committed to nude martians - they're rare enough that it shouldn't significantly upset the game's balance.