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/GTLBase64.h

@@ -0,0 +1,25 @@
+/* Copyright (c) 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 <Foundation/Foundation.h>
+
+NSData *GTLDecodeBase64(NSString *base64Str);
+NSString *GTLEncodeBase64(NSData *data);
+
+// "Web-safe" encoding substitutes - and _ for + and / in the encoding table,
+// per http://www.ietf.org/rfc/rfc4648.txt section 5.
+
+NSData *GTLDecodeWebSafeBase64(NSString *base64Str);
+NSString *GTLEncodeWebSafeBase64(NSData *data);