Added json app configuration fetch

Added app log events synchronization
Added A/B test API

TelegramCore/ManagedAppConfigurationUpdates.swift

@@ -0,0 +1,29 @@
+import Foundation
+#if os(macOS)
+    import PostboxMac
+    import SwiftSignalKitMac
+    import MtProtoKitMac
+#else
+    import Postbox
+    import SwiftSignalKit
+    import MtProtoKitDynamic
+#endif
+
+func managedAppConfigurationUpdates(postbox: Postbox, network: Network) -> Signal<Void, NoError> {
+    let poll = Signal<Void, NoError> { subscriber in
+        return (network.request(Api.functions.help.getAppConfig())
+        |> retryRequest
+        |> mapToSignal { result -> Signal<Void, NoError> in
+            return postbox.transaction { transaction -> Void in
+                if let data = JSON(apiJson: result) {
+                    updateAppConfiguration(transaction: transaction, { configuration -> AppConfiguration in
+                        var configuration = configuration
+                        configuration.data = data
+                        return configuration
+                    })
+                }
+            }
+        }).start()
+    }
+    return (poll |> then(.complete() |> suspendAwareDelay(12.0 * 60.0 * 60.0, queue: Queue.concurrentDefaultQueue()))) |> restart
+}