Add FurnaceExtractEvent. Addresses BUKKIT-2114

Added a "BlockExpEvent" to hold experience and the handlers for the events

src/main/java/org/bukkit/event/block/BlockExpEvent.java

@@ -0,0 +1,44 @@
+package org.bukkit.event.block;
+
+import org.bukkit.block.Block;
+import org.bukkit.event.HandlerList;
+
+/**
+ * An event that's called when a block yields experience.
+ */
+public class BlockExpEvent extends BlockEvent {
+    private static final HandlerList handlers = new HandlerList();
+    private int exp;
+
+    public BlockExpEvent(Block block, int exp) {
+        super(block);
+
+        this.exp = exp;
+    }
+
+    /**
+     * Get the experience dropped by the block after the event has processed
+     *
+     * @return The experience to drop
+     */
+    public int getExpToDrop() {
+        return exp;
+    }
+
+    /**
+     * Set the amount of experience dropped by the block after the event has processed
+     *
+     * @param exp 1 or higher to drop experience, else nothing will drop
+     */
+    public void setExpToDrop(int exp) {
+        this.exp = exp;
+    }
+
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}