Add sun related API (#1546)

These methods are used internally throughout the game for things like spawning mobs during day/night only or making them burn in daylight, etc. Now exposed for plugin usage.

Spigot-API-Patches/0160-Add-sun-related-API.patch

@@ -0,0 +1,48 @@
+From 86b386e1158f061a25df7b3b0a5bd56102252ce9 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <Blake.Galbreath@GMail.com>
+Date: Sun, 7 Oct 2018 00:54:15 -0500
+Subject: [PATCH] Add sun related API
+
+
+diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
+index 7bfe0b68..12c4bdff 100644
+--- a/src/main/java/org/bukkit/World.java
++++ b/src/main/java/org/bukkit/World.java
+@@ -1204,6 +1204,16 @@ public interface World extends PluginMessageRecipient, Metadatable {
+      */
+     public void setFullTime(long time);
+ 
++    // Paper start
++
++    /**
++     * Check if it is currently daytime in this world
++     *
++     * @return True if it is daytime
++     */
++    public boolean isDayTime();
++    // Paper end
++
+     /**
+      * Returns whether the world has an ongoing storm.
+      *
+diff --git a/src/main/java/org/bukkit/entity/Mob.java b/src/main/java/org/bukkit/entity/Mob.java
+index 48eddcd3..1b108a4a 100644
+--- a/src/main/java/org/bukkit/entity/Mob.java
++++ b/src/main/java/org/bukkit/entity/Mob.java
+@@ -13,6 +13,13 @@ public interface Mob extends LivingEntity, Lootable {
+      * @return Pathfinding Manager for this entity
+      */
+     com.destroystokyo.paper.entity.Pathfinder getPathfinder();
++
++    /**
++     * Check if this mob is exposed to daylight
++     *
++     * @return True if mob is exposed to daylight
++     */
++    boolean isInDaylight();
+     // Paper end
+ 
+     /**
+-- 
+2.19.0
+