Sharing on Facebook, Twitter and Google+

[FIXED]     Font of navbar.
[FIXED]     A few compile fixes.
[IMPROVED]  Made properties nonatomic.
[ADDED]     Support for facebook, twitter and google+ sharing.

External/google-plus-ios-sdk/OpenSource/GTL/GTLErrorObject.h

@@ -0,0 +1,45 @@
+/* Copyright (c) 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  GTLErrorObject.h
+//
+
+#import "GTLObject.h"
+
+@class GTLErrorObjectData;
+
+@interface GTLErrorObject : GTLObject
+@property (retain) NSNumber *code;
+@property (retain) NSString *message;
+@property (retain) NSArray *data; // of GTLErrorObjectData
+
+// Convenience accessor for creating an NSError from a GTLErrorObject.
+@property (readonly) NSError *foundationError;
+
+// Convenience accessor for extracting the GTLErrorObject that was used to
+// create an NSError.
+//
+// Returns nil if the error was not originally from a GTLErrorObject.
++ (GTLErrorObject *)underlyingObjectForError:(NSError *)foundationError;
+
+@end
+
+@interface GTLErrorObjectData : GTLObject
+@property (retain) NSString *domain;
+@property (retain) NSString *reason;
+@property (retain) NSString *message;
+@property (retain) NSString *location;
+@end