UITableView rx_autoUpdater workaround

[arielpollack]

As the documentation mentions, rx_autoUpdater doesn't work along with tableView.rx.items and it's variations. It basically happens because the dataSource proxy fires tableView.reloadData() when the data array changes. I've implemented a workaround that keeps the reloading of the tableView optional. you can see exactly what I've done here: https://github.com/DaPulse/RxSwift/commit/a4516162523b8b9e47edf6408c16017b79916029

Feel free to use it instead of the original repo.