Support Collection Changes Notifications

[mbalex99]

After 3 years of poverty and dispair, Realm Finally added Collection Changes Notifications. Basically they can observe weather a collection has inserted, updated, changed, moved etc...

You can find more information here : https://realm.io/docs/swift/latest/#notifications

let myDog = Dog()
        myDog.name = "Rex"
        myDog.age = 1

        realm.add(myDog)


       notificationToken = results.addNotificationBlock { [weak self] (changes: RealmCollectionChange) in
      guard let tableView = self?.tableView else { return }
      switch changes {
      case .Initial:
        // Results are now populated and can be accessed without blocking the UI
        tableView.reloadData()
        break
      case .Update(_, let deletions, let insertions, let modifications):
        // Query results have changed, so apply them to the UITableView
        tableView.beginUpdates()
        tableView.insertRowsAtIndexPaths(insertions.map { NSIndexPath(forRow: $0, inSection: 0) },
          withRowAnimation: .Automatic)
        tableView.deleteRowsAtIndexPaths(deletions.map { NSIndexPath(forRow: $0, inSection: 0) },
          withRowAnimation: .Automatic)
        tableView.reloadRowsAtIndexPaths(modifications.map { NSIndexPath(forRow: $0, inSection: 0) },
          withRowAnimation: .Automatic)
        tableView.endUpdates()
        break
      case .Error(let error):
        // An error occurred while opening the Realm file on the background worker thread
        fatalError("\(error)")
        break
      }
    }

[icanzilb]

Please keep neutral tone when reporting bugs or issues. Fine grained notifications have been added in 0.1.3: https://github.com/RxSwiftCommunity/RxRealm/releases/tag/0.1.3