- Add Facebook SDK

- Add PNUser Login

Example/Pods/Bolts/Bolts/Common/BFCancellationTokenRegistration.h

@@ -0,0 +1,29 @@
+/*
+ *  Copyright (c) 2014, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*!
+ Represents the registration of a cancellation observer with a cancellation token.
+ Can be used to unregister the observer at a later time.
+ */
+@interface BFCancellationTokenRegistration : NSObject
+
+/*!
+ Removes the cancellation observer registered with the token
+ and releases all resources associated with this registration.
+ */
+- (void)dispose;
+
+@end
+
+NS_ASSUME_NONNULL_END