Excluded armor stands from //butcher by default.

Someone got lazy and just made armor stands a living entity instead of extracting an ArmorEquippable interface.

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeEntityType.java

@@ -135,4 +135,9 @@ public class ForgeEntityType implements EntityType {
     public boolean isTagged() {
         return entity instanceof EntityLiving && ((EntityLiving) entity).hasCustomNameTag();
     }
+
+    @Override
+    public boolean isArmorStand() {
+        return false; // TODO re-add when forge version is updated to 1.8: entity instanceof EntityArmorStand;
+    }
 }