[Bleeding] Add new events for Hanging entities, deprecate old Painting

events. Adds BUKKIT-2754

src/main/java/org/bukkit/event/hanging/HangingEvent.java

@@ -0,0 +1,24 @@
+package org.bukkit.event.hanging;
+
+import org.bukkit.entity.Hanging;
+import org.bukkit.event.Event;
+
+/**
+ * Represents a hanging entity-related event.
+ */
+public abstract class HangingEvent extends Event {
+    protected Hanging hanging;
+
+    protected HangingEvent(final Hanging painting) {
+        this.hanging = painting;
+    }
+
+    /**
+     * Gets the hanging entity involved in this event.
+     *
+     * @return the hanging entity
+     */
+    public Hanging getEntity() {
+        return hanging;
+    }
+}