Merge branch 'master' into breaking

# Conflicts:
#	Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/events/PlotRateEvent.java
#	Bukkit/src/main/java/com/plotsquared/bukkit/util/BukkitEventUtil.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/PlotSquared.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Add.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Auto.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Delete.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Kick.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Load.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Music.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Owner.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Rate.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Reload.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/SchematicCmd.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Trust.java
#	Core/src/main/java/com/github/intellectualsites/plotsquared/plot/flag/GameModeFlag.java
#	Core/src/main/java/com/intellectualcrafters/plot/commands/Clear.java
#	Core/src/main/java/com/intellectualcrafters/plot/commands/PluginCmd.java
#	Core/src/main/java/com/intellectualcrafters/plot/commands/Relight.java
#	Core/src/main/java/com/intellectualcrafters/plot/commands/SetHome.java
#	Core/src/main/java/com/intellectualcrafters/plot/config/C.java
#	Core/src/main/java/com/intellectualcrafters/plot/config/Configuration.java
#	Core/src/main/java/com/intellectualcrafters/plot/config/Settings.java
#	Core/src/test/java/com/github/intellectualsites/plotsquared/plot/util/EventUtilTest.java
#	Nukkit/src/main/java/com/plotsquared/nukkit/util/NukkitEventUtil.java
#	README.md
#	Sponge/src/main/java/com/github/intellectualsites/plotsquared/sponge/events/PlotRateEvent.java
#	Sponge/src/main/java/com/github/intellectualsites/plotsquared/sponge/util/SpongeSchematicHandler.java
#	Sponge/src/main/java/com/github/intellectualsites/plotsquared/sponge/util/block/SpongeLocalQueue.java
#	Sponge/src/main/java/com/plotsquared/sponge/util/SpongeEventUtil.java

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/NukkitMain.java

@@ -199,8 +199,7 @@ public final class NukkitMain extends PluginBase implements Listener, IPlotMain
                                 if (entity instanceof Player) {
                                     continue;
                                 }
-                                Location location =
-                                    NukkitUtil.getLocation(entity.getLocation());
+                                Location location = NukkitUtil.getLocation(entity.getLocation());
                                 Plot plot = location.getPlot();
                                 if (plot == null) {
                                     if (location.isPlotArea()) {

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/events/PlotChangeOwnerEvent.java

@@ -0,0 +1,107 @@
+package com.github.intellectualsites.plotsquared.nukkit.events;
+
+import cn.nukkit.Player;
+import cn.nukkit.event.Cancellable;
+import cn.nukkit.event.HandlerList;
+import com.github.intellectualsites.plotsquared.plot.object.Plot;
+import com.github.intellectualsites.plotsquared.plot.object.PlotId;
+
+import java.util.UUID;
+
+public class PlotChangeOwnerEvent extends PlotEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+    private final Plot plot;
+    private final Player initiator;
+    private final UUID newOwner;
+    private final UUID oldOwner;
+    private final boolean hasOldOwner;
+    private boolean cancelled;
+
+    /**
+     * PlotChangeOwnerEvent: Called when a plot's owner is change.
+     *
+     * @param newOwner The new owner of the plot
+     * @param oldOwner The old owner of the plot
+     * @param plot     The plot having its owner changed
+     */
+    public PlotChangeOwnerEvent(Player initiator, Plot plot, UUID oldOwner, UUID newOwner,
+        boolean hasOldOwner) {
+        super(plot);
+        this.plot = plot;
+        this.initiator = initiator;
+        this.newOwner = newOwner;
+        this.hasOldOwner = hasOldOwner;
+        this.oldOwner = oldOwner;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    /**
+     * Get the PlotId.
+     *
+     * @return PlotId
+     */
+    public PlotId getPlotId() {
+        return getPlot().getId();
+    }
+
+    /**
+     * Get the world name.
+     *
+     * @return String
+     */
+    public String getWorld() {
+        return getPlot().getWorldName();
+    }
+
+    /**
+     * Get the change-owner initator
+     *
+     * @return Player
+     */
+    public Player getInitiator() {
+        return this.initiator;
+    }
+
+    /**
+     * Get the old owner of the plot
+     *
+     * @return UUID
+     */
+    public UUID getOldOwner() {
+        return this.oldOwner;
+    }
+
+    /**
+     * Get the new owner of the plot
+     *
+     * @return UUID
+     */
+    public UUID getNewOwner() {
+        return this.newOwner;
+    }
+
+    /**
+     * Get if the plot had an old owner
+     *
+     * @return boolean
+     */
+    public boolean hasOldOwner() {
+        return this.hasOldOwner;
+    }
+
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @Override public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override public void setCancelled(boolean b) {
+        this.cancelled = b;
+    }
+}

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/events/PlotRateEvent.java

@@ -1,15 +1,17 @@
 package com.github.intellectualsites.plotsquared.nukkit.events;
 
+import cn.nukkit.event.Cancellable;
 import cn.nukkit.event.HandlerList;
 import com.github.intellectualsites.plotsquared.plot.object.Plot;
 import com.github.intellectualsites.plotsquared.plot.object.PlotPlayer;
 import com.github.intellectualsites.plotsquared.plot.object.Rating;
 
-public class PlotRateEvent extends PlotEvent {
+public class PlotRateEvent extends PlotEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
     private final PlotPlayer rater;
     private Rating rating;
+    private boolean cancelled = false;
 
     public PlotRateEvent(PlotPlayer rater, Rating rating, Plot plot) {
         super(plot);
@@ -33,4 +35,11 @@ public class PlotRateEvent extends PlotEvent {
         this.rating = rating;
     }
 
+    @Override public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
 }

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/generator/NukkitPlotGenerator.java

@@ -61,7 +61,8 @@ public class NukkitPlotGenerator extends Generator implements GeneratorWrapper<G
 
                 @Override
                 public PlotArea getNewPlotArea(String world, String id, PlotId min, PlotId max) {
-                    return PlotSquared.get().IMP.getDefaultGenerator().getNewPlotArea(world, id, min, max);
+                    return PlotSquared.get().IMP.getDefaultGenerator()
+                        .getNewPlotArea(world, id, min, max);
                 }
 
                 @Override

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/listeners/PlayerEvents.java

@@ -612,8 +612,10 @@ public class PlayerEvents extends PlotListener implements Listener {
         }
     }
 
-    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
-    public void onChat(PlayerChatEvent event) {
+    @EventHandler(priority = EventPriority.LOW) public void onChat(PlayerChatEvent event) {
+        if (event.isCancelled())
+            return;
+
         PlotPlayer plotPlayer = NukkitUtil.getPlayer(event.getPlayer());
         Location location = plotPlayer.getLocation();
         PlotArea area = location.getPlotArea();

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/util/NukkitEventUtil.java

@@ -10,6 +10,7 @@ import com.github.intellectualsites.plotsquared.plot.flag.Flag;
 import com.github.intellectualsites.plotsquared.plot.object.*;
 import com.github.intellectualsites.plotsquared.plot.util.EventUtil;
 
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.UUID;
 
@@ -89,13 +90,23 @@ public class NukkitEventUtil extends EventUtil {
         callEvent(new PlayerPlotHelperEvent(getPlayer(initiator), plot, player, added));
     }
 
+    @Override
+    public boolean callOwnerChange(PlotPlayer initiator, Plot plot, UUID oldOwner, UUID newOwner,
+        boolean hasOldOwner) {
+        return callEvent(
+            new PlotChangeOwnerEvent(getPlayer(initiator), plot, oldOwner, newOwner, hasOldOwner));
+    }
+
     @Override public boolean callFlagRemove(Flag flag, Object object, PlotCluster cluster) {
         return callEvent(new ClusterFlagRemoveEvent(flag, cluster));
     }
 
-    @Override public Rating callRating(PlotPlayer player, Plot plot, Rating rating) {
+    @Override @Nullable public Rating callRating(PlotPlayer player, Plot plot, Rating rating) {
         PlotRateEvent event = new PlotRateEvent(player, rating, plot);
         plugin.getServer().getPluginManager().callEvent(event);
+        if (event.isCancelled()) {
+            return null;
+        }
         return event.getRating();
     }
 

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/util/NukkitSetupUtils.java

@@ -53,7 +53,8 @@ public class NukkitSetupUtils extends SetupUtils {
         if (!PlotSquared.get().worlds.contains(worldPath)) {
             PlotSquared.get().worlds.createSection(worldPath);
         }
-        ConfigurationSection worldSection = PlotSquared.get().worlds.getConfigurationSection(worldPath);
+        ConfigurationSection worldSection =
+            PlotSquared.get().worlds.getConfigurationSection(worldPath);
         switch (type) {
             case 2: {
                 if (object.id != null) {
@@ -99,8 +100,10 @@ public class NukkitSetupUtils extends SetupUtils {
                     worldSection.set(step.getConstant(), step.getValue());
                 }
                 PlotSquared.get().worlds.set("worlds." + world + ".generator.type", object.type);
-                PlotSquared.get().worlds.set("worlds." + world + ".generator.terrain", object.terrain);
-                PlotSquared.get().worlds.set("worlds." + world + ".generator.plugin", object.plotManager);
+                PlotSquared.get().worlds
+                    .set("worlds." + world + ".generator.terrain", object.terrain);
+                PlotSquared.get().worlds
+                    .set("worlds." + world + ".generator.plugin", object.plotManager);
                 if (object.setupGenerator != null && !object.setupGenerator
                     .equals(object.plotManager)) {
                     PlotSquared.get().worlds

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/util/NukkitTaskManager.java

@@ -12,6 +12,7 @@ public class NukkitTaskManager extends TaskManager {
     private final NukkitMain plugin;
     private AtomicInteger index = new AtomicInteger(0);
     private HashMap<Integer, Integer> tasks = new HashMap<>();
+
     public NukkitTaskManager(NukkitMain bukkitMain) {
         this.plugin = bukkitMain;
     }

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/util/block/NukkitHybridGen.java

@@ -14,7 +14,8 @@ public class NukkitHybridGen extends NukkitPlotGenerator {
 
     private static Map<String, Object> defaultSettings(Map<String, Object> existing) {
         if (!existing.containsKey("world")) {
-            Map<Integer, Level> levels = ((NukkitMain) PlotSquared.get().IMP).getServer().getLevels();
+            Map<Integer, Level> levels =
+                ((NukkitMain) PlotSquared.get().IMP).getServer().getLevels();
             int max = -1;
             for (Map.Entry<Integer, Level> entry : levels.entrySet()) {
                 int id = entry.getKey();