New Entity Classes implementing the new Bukkit interfaces.

src/main/java/org/bukkit/craftbukkit/entity/CraftSpider.java

@@ -0,0 +1,14 @@
+package org.bukkit.craftbukkit.entity;
+
+import net.minecraft.server.EntitySpider;
+
+import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.entity.Spider;
+
+public class CraftSpider extends CraftMonster implements Spider {
+
+    public CraftSpider(CraftServer server, EntitySpider entity) {
+        super(server, entity);
+    }
+
+}