title: Post raw text with AFNetworking
body: <p>I am using <code>AFNetworking</code> and I am trying to perform raw post of text. When I look through the docs it appears that I can attach a dictionary of data but I cannot figure out how to pass raw text. The raw text I want to pass is:</p>
  
  <pre><code>{
   Email : "name@company.com"
   , Password : "password"
   , Accesskey : "long access key"
  }
  </code></pre>
  
  <p>The sample code snippet I wanted to use is below. The problem is that I want to pass raw text and the example below expects an <code>NSDictionary</code> (parameters) whereas I simple want to pass a string.</p>
  
  <pre><code>       [client postPath:@"weather.php"
            parameters:parameters
               success:^(AFHTTPRequestOperation *operation, id responseObject) {
                   self.weather = responseObject;
                   self.title = @"HTTP POST";
                   [self.tableView reloadData];
               }
               failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                   UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather"
                                                                message:[NSString stringWithFormat:@"%@",error]
  </code></pre>