Added new DailyEvents.
1. LEVITATION_DAY: (in normal worlds) get Levitation effect.
2. HEAVY_DAY: (in normal worlds) get an effect that doesn't allow high jumping.

Fix the bug that "leaf" server doesn't support this plugin.
Fix the bug that some messages announce repeatedly.

Added BukkitListeners option for CustomEventType!

Added PlaceholderAPI_support.None option.

Fix the bug that the option "EDGE" for Custom Event doesn't work.

Now support more Papis.

Fix the bug that the plugin generates wrong events at wrong time; Fix the bug that null pointer exists when admins reload the plugin.

Added NothingEvent, default priority is 0.
Added PlaceholderAPI variable: %dailyevents_CurrentWorldNextEventOfxxx%

The plugin now can tell the operators which option they haven't configured.

Fix the bug that some events can't be triggered properly. Important! Please update the plugin to 1.1.1 version if you are using version under 1.1.1.

Fix the bug that the server can't load the new language file properly.

No update for the content of the plugin, just the architecture