Update authors section in Podspec
Fix JSON raw string encoding

* The primus server-side protocol handler listens for certain
  special events (such as primus::id::). These events must be
  sent as a string, and not as binary data.

  In node, or a typical browser implemention,

  ```
    JSON.stringify('hello');
  ```

  will return '"hello"' (notice the double quotes).

  However, since the NSJSONSerialization class expects an instance
  of an NSDictionary or NSArray, it is not possible to serialize
  strings in the same manner. The solution is to manually add the
  double quotes and skip serialization altogether.