is this a bug? about $object.

test.json

``` json
[
  {
    "a": 1
  },
  {
    "b": 2
  }
]
```

my code:

``` js

        var tasks = Restangular.all("test.json").getList();

        tasks.push({c: 3});
        $scope.tasks = tasks.$object; // {c:3} disappear?
```
