Moon phase is reversed in dark mode.

It feels stupid, but since my terminal writes light letters on a dark background, the moon phase seems just the opposite of what it should 8) For instance, it’s full moon today, but:

How could we improve this? I guess the simplest, in order not to have to detect the terminal colors, is to provide a flipmoon option?

[chubin]

@iago-lito Perhaps, we should add this advice about the fonts to README

^{_{(and I see that the weather at Montpellier is much better today)}}

[chubin]

@iago-lito Very interesting document. Maybe we should add a link to it to README.md with some short clarification.