Netflix/RxJava — pull request #1142 by zsxwing (2014-05-03 08:30:30+00:00)
Title: Update 'contains' signature to 'contains(Object)'

The original `contains` signature can not support the following codes:

```java
public void test() {
ArrayList l = new ArrayList();
l.add("test");
Observable> o = Observable.>from(l);
o.contains(Arrays.asList("test"));
}
```

This PR changes the signature from `contains(T)` to `contains(Object)`. It's also consistent with `equals(Object)`.

This change should not break the old codes.