Copy paste/merge FAWE classes to this WorldEdit fork

- so certain people can look at the diff and complain about my sloppy code :(

Signed-off-by: Jesse Boyd <jessepaleg@gmail.com>

worldedit-core/src/main/java/com/sk89q/worldedit/entity/BaseEntity.java

@@ -19,14 +19,14 @@
 
 package com.sk89q.worldedit.entity;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.world.NbtValued;
 import com.sk89q.worldedit.world.entity.EntityType;
 
 import javax.annotation.Nullable;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 /**
  * Represents a mutable "snapshot" of an entity.
  *

worldedit-core/src/main/java/com/sk89q/worldedit/entity/Player.java

@@ -22,7 +22,8 @@ package com.sk89q.worldedit.entity;
 import com.sk89q.worldedit.PlayerDirection;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.WorldEditException;
-import com.sk89q.worldedit.world.block.BaseBlock;
+import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.extent.inventory.BlockBag;

worldedit-core/src/main/java/com/sk89q/worldedit/entity/metadata/Metadatable.java

@@ -0,0 +1,67 @@
+package com.sk89q.worldedit.entity.metadata;
+
+import java.util.Map;
+
+public interface Metadatable {
+    Map<String, Object> getMetaMap();
+
+    /**
+     * Set some session only metadata for the player
+     *
+     * @param key
+     * @param value
+     * @return previous value
+     */
+    default void setMeta(String key, Object value) {
+        getMetaMap().put(key, value);
+    }
+
+    default <T> T getAndSetMeta(String key, T value) {
+        return (T) getMetaMap().put(key, value);
+    }
+
+    default boolean hasMeta() {
+        return !getMetaMap().isEmpty();
+    }
+
+    /**
+     * Get the metadata for a key.
+     *
+     * @param <V>
+     * @param key
+     * @return
+     */
+    default <V> V getMeta(String key) {
+        if (getMetaMap() != null) {
+            return (V) getMetaMap().get(key);
+        }
+        return null;
+    }
+
+    /**
+     * Get the metadata for a specific key (or return the default provided)
+     *
+     * @param key
+     * @param def
+     * @param <V>
+     * @return
+     */
+    default <V> V getMeta(String key, V def) {
+        if (getMetaMap() != null) {
+            V value = (V) getMetaMap().get(key);
+            return value == null ? def : value;
+        }
+        return def;
+    }
+
+    /**
+     * Delete the metadata for a key.
+     * - metadata is session only
+     * - deleting other plugin's metadata may cause issues
+     *
+     * @param key
+     */
+    default <V> V deleteMeta(String key) {
+        return getMetaMap() == null ? null : (V) getMetaMap().remove(key);
+    }
+}