title: JSONKit issue : Illegal Unicode escape sequence
body: <p>When using AFNetwork (with JSONKit ), got a error:</p>
  <blockquote>
  <p>Domain=JKErrorDomain Code=-1 &quot;Illegal \u Unicode escape sequence.&quot; UserInfo=0x834cab0 {JKAtIndexKey=218, JKLineNumberKey=1, NSLocalizedDescription=Illegal \u Unicode escape sequence.}</p>
  </blockquote>
  <p>Searching lets me know such <a href="https://github.com/johnezang/JSONKit/pull/26" rel="nofollow noreferrer">details</a></p>
  <p>Any fixs or workaround for this issue ?</p>