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/SampleCode/GooglePlusSampleMomentsViewController.h

@@ -0,0 +1,45 @@
+//
+//  GooglePlusSampleMomentsViewController.h
+//
+//  Copyright 2012 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.
+//
+
+#import <UIKit/UIKit.h>
+
+@class GTLServicePlus;
+
+// A view controller for writing different kinds of moments to Google+ history.
+// The open-source GTLPlus libraries are required. For more details, see
+// https://developers.google.com/+/history/ .
+@interface GooglePlusSampleMomentsViewController : UIViewController<
+    UITableViewDelegate,
+    UITableViewDataSource,
+    UITextFieldDelegate> {
+  BOOL keyboardVisible_;
+}
+
+// The table that displays the different kinds of moments available.
+@property (retain, nonatomic) IBOutlet UITableView *momentsTable;
+// The target URL to associate with this moment.
+@property (retain, nonatomic) IBOutlet UITextField *momentURL;
+// A label to display the result of writing a moment.
+@property (retain, nonatomic) IBOutlet UILabel *momentStatus;
+// The "Add Moment" button.
+@property (retain, nonatomic) IBOutlet UIButton *addButton;
+
+// Called when the user presses the "Add Moment" button.
+- (IBAction)momentButton:(id)sender;
+
+@end