Placeholder for CurrentSeasons Days remaining.

[Paul-DK]

Describe the feature

Would you be able to add something like:

%advancedseasons_season_daysremaining%

To accompany this, it would be great to have:

%advancedseasons_season_nextseason%

So that things like "XXX days until Summer!!" can be produced in Scoreboards, etc?

Thank for all your amazing hardwork!!

[Ynverxe]

Done!