title: Emoji are not being encoded correctly for output writer
body: <p>The program takes in a comment and persists it. The database stores the value correctly.( i'm able to copy and paste it into an emoji page and it shows up correctly). The string i see in the debugger on the postComment request and in the getAllComments response is the same, but it is sending {0xED, 0xA0, 0xBD, 0xED, 0xB8, 0x80 } instead of { 0xF0, 0x9F, 0x98, 0x80 } and showing up as several characters instead of 1. If i set the encoding to UnicodeBig the emoji show up in the response, but we need to be using UTF-8 </p>
  
  <pre><code>String jsonString = jsonMapper.toJson(jsonResponse);
  response.setContentType("application/json");
  response.setCharacterEncoding("UTF-8");
  response.getWriter().println(jsonString);
  </code></pre>
  
  <p>Do i need to do something to these strings before having the system encode to utf8?
  the libs used are</p>
  
  <p>json-simple-1.1(current is 1.1.1)
  jackson-core-2.2.3(current 2.6)</p>
  
  <p>Thank you.</p>