Netflix/RxJava — pull request #343 by benjchristensen (2013-09-04 19:14:20+00:00)
Title: Covariant Support with super/extends and OnSubscribeFunc

Merging and adding to work by @jmhofer in https://github.com/Netflix/RxJava/pull/331

In particular this adds the following change to the previous pull request:

```java
public static Observable create(Func1, ? extends Subscription> func)
```

to

```java
public static Observable create(OnSubscribeFunc func)
```