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/GTMNSDictionary+URLArguments.m

@@ -0,0 +1,71 @@
+//
+//  GTMNSDictionary+URLArguments.m
+//
+//  Copyright 2006-2008 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 "GTMNSDictionary+URLArguments.h"
+#import "GTMNSString+URLArguments.h"
+#import "GTMMethodCheck.h"
+#import "GTMDefines.h"
+
+@implementation NSDictionary (GTMNSDictionaryURLArgumentsAdditions)
+
+GTM_METHOD_CHECK(NSString, gtm_stringByEscapingForURLArgument);
+GTM_METHOD_CHECK(NSString, gtm_stringByUnescapingFromURLArgument);
+
++ (NSDictionary *)gtm_dictionaryWithHttpArgumentsString:(NSString *)argString {
+  NSMutableDictionary* ret = [NSMutableDictionary dictionary];
+  NSArray* components = [argString componentsSeparatedByString:@"&"];
+  NSString* component;
+  // Use reverse order so that the first occurrence of a key replaces
+  // those subsequent.
+  GTM_FOREACH_ENUMEREE(component, [components reverseObjectEnumerator]) {
+    if ([component length] == 0)
+      continue;
+    NSRange pos = [component rangeOfString:@"="];
+    NSString *key;
+    NSString *val;
+    if (pos.location == NSNotFound) {
+      key = [component gtm_stringByUnescapingFromURLArgument];
+      val = @"";
+    } else {
+      key = [[component substringToIndex:pos.location]
+             gtm_stringByUnescapingFromURLArgument];
+      val = [[component substringFromIndex:pos.location + pos.length]
+             gtm_stringByUnescapingFromURLArgument];
+    }
+    // gtm_stringByUnescapingFromURLArgument returns nil on invalid UTF8
+    // and NSMutableDictionary raises an exception when passed nil values.
+    if (!key) key = @"";
+    if (!val) val = @"";
+    [ret setObject:val forKey:key];
+  }
+  return ret;
+}
+
+- (NSString *)gtm_httpArgumentsString {
+  NSMutableArray* arguments = [NSMutableArray arrayWithCapacity:[self count]];
+  NSString* key;
+  GTM_FOREACH_KEY(key, self) {
+    [arguments addObject:[NSString stringWithFormat:@"%@=%@",
+                          [key gtm_stringByEscapingForURLArgument],
+                          [[[self objectForKey:key] description] gtm_stringByEscapingForURLArgument]]];
+  }
+
+  return [arguments componentsJoinedByString:@"&"];
+}
+
+@end