Fix infinity scrolling

[selfsx]

I've recently started to use JMStatefulTableViewController 0.1.1 with SVPullToRefresh 0.4.1. It seemed to me that issue #1 is still there. By digging code I realized that issue happens because after our callback in statefulTableViewControllerWillBeginLoadingNextPage: SVInfiniteScrollingView still has SVInfiniteScrollingStateLoading state and can't fire the handler. As mentioned in SVPullToRefresh docs you should manually call [tableView.infiniteScrollingView stopAnimating] inside infinity scrolling handler when you've done. It switches state to SVInfiniteScrollingStateStopped. I've added needed calls to _loadNextPage and it seems like everything works fine.

I've also added initWithCoder: for correct initialization of my controllers which instantiated from storyboards.

Sorry if I'm wrong with something. Thanks.

[KaterynaSytnyk]

Storyboard support would be amazing! thanks

[robegamesios]

+1 more on the Storyboard support please! :) Thanks

[maksym-letiushov]

Please add a storyboard support. Thank you.