Fix Craft Entity constructors and toStrings.

Also, standardise getHandle and clean up in general.
getHandle is now using the 'entity' member variable instead of
super.getHandle, as this reduces the number of chained calls needed.

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

@@ -6,12 +6,17 @@ import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.entity.ComplexLivingEntity;
 
 public abstract class CraftComplexLivingEntity extends CraftLivingEntity implements ComplexLivingEntity {
-    public CraftComplexLivingEntity(CraftServer server, EntityLiving entity) {
+    public CraftComplexLivingEntity(CraftServer server, EntityComplex entity) {
         super(server, entity);
     }
 
     @Override
     public EntityComplex getHandle() {
-        return (EntityComplex)super.getHandle();
+        return (EntityComplex) entity;
+    }
+
+    @Override
+    public String toString() {
+        return "CraftComplexLivingEntity";
     }
 }