Create multiple Ajax requests and group the the results.

With redux-observable, we have the power of RxJS at our disposal - this means tasks that would otherwise be complicated and imperative, become simple and declarative. In this lesson we’ll respond to an action by queuing up 2 separate Ajax requests that will execute in parallel. Then we’ll group the results from both into an array and produce a single action from our epic that will save the data into the redux store.