Adding all Entities into CraftBukkit.

These are needed to properly allow for determining class type, in
accordance with current practice.

src/main/java/net/minecraft/server/EntityPig.java

@@ -0,0 +1,61 @@
+package net.minecraft.server;
+
+public class EntityPig extends EntityAnimals {
+
+    public EntityPig(World world) {
+        super(world);
+        aP = "/mob/pig.png";
+        a(0.9F, 0.9F);
+    }
+
+    protected void a() {
+        af.a(16, ((Byte.valueOf((byte) 0))));
+    }
+
+    public void a(NBTTagCompound nbttagcompound) {
+        super.a(nbttagcompound);
+        nbttagcompound.a("Saddle", K());
+    }
+
+    public void b(NBTTagCompound nbttagcompound) {
+        super.b(nbttagcompound);
+        a(nbttagcompound.l("Saddle"));
+    }
+
+    protected String e() {
+        return "mob.pig";
+    }
+
+    protected String f() {
+        return "mob.pig";
+    }
+
+    protected String g() {
+        return "mob.pigdeath";
+    }
+
+    public boolean a(EntityPlayer entityplayer) {
+        if (K() && !l.z && (j == null || j == entityplayer)) {
+            entityplayer.e(((Entity) (this)));
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    protected int h() {
+        return Item.ao.ba;
+    }
+
+    public boolean K() {
+        return (af.a(16) & 1) != 0;
+    }
+
+    public void a(boolean flag) {
+        if (flag) {
+            af.b(16, ((Byte.valueOf((byte) 1))));
+        } else {
+            af.b(16, ((Byte.valueOf((byte) 0))));
+        }
+    }
+}