Removed NMS imports, should be more version-friendly now (still using a Spigot-only import, so doubt it'll work on just Bukkit). Previously using NMS helper classes to send titles, now using Player#sendTitle() and TextComponent.
Cleaned up a lot of public-static stuff in favor of somewhat more encapsulated data.
Added a config variable 'morning-subtitle' to allow some configuration of the greeting displayed upon reaching morning. This new option now offers a variable {PLAYER} that is replaced with the player's name. If you've somehow ALREADY gotten an old config on your server, the plugin should handle adding this new value to existing worlds in the config.