Moon phase should be known to the player

[Lyle-Tafoya]

It used to be that the moon phase was always displayed on-screen. Moon-phase, does not affect a lot, but it does have a significant impact in the areas that it does affect. I don't think it necessarily needs to be displayed on-screen at all times, but there should be some visibility into this. Maybe it can be handled like in NetHack, where it displays a message to the player when they start/load their game. We could also display a message when it changes.