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/EntityAnimals.java

@@ -0,0 +1,36 @@
+package net.minecraft.server;
+
+public abstract class EntityAnimals extends EntityCreature implements IAnimals {
+
+    public EntityAnimals(World world) {
+        super(world);
+    }
+
+    protected float a(int i, int j, int k) {
+        if (l.a(i, j - 1, k) == Block.u.bi) {
+            return 10F;
+        } else {
+            return l.l(i, j, k) - 0.5F;
+        }
+    }
+
+    public void a(NBTTagCompound nbttagcompound) {
+        super.a(nbttagcompound);
+    }
+
+    public void b(NBTTagCompound nbttagcompound) {
+        super.b(nbttagcompound);
+    }
+
+    public boolean b() {
+        int i = MathHelper.b(p);
+        int j = MathHelper.b(z.b);
+        int k = MathHelper.b(r);
+
+        return l.a(i, j - 1, k) == Block.u.bi && l.j(i, j, k) > 8 && super.b();
+    }
+
+    public int c() {
+        return 120;
+    }
+}