title: DynamoDBMapper for java.time.LocalDateTime
body: <p>I'm utilizing java.time.LocalDateTime in my java application. I'm also trying to use <code>DynamoDBMapper</code> and via the annotation save the <code>LocalDateTime</code> variable. Unfortunately I get the following error:</p>
  
  <pre><code>DynamoDBMappingException: Unsupported type: class java.time.LocalDateTime
  </code></pre>
  
  <p>Is there a way to have this mapping without using <code>DynamoDBMarshalling</code>?</p>