====== REST Response Format ======

REST is the simplest response format to use - it's a simple XML block.
 
To return the response in REST format, send a parameter "**output_format**" in the 
request with a value of "**rest**". When using the REST request method, the 
response defaults to REST.

A method call returns this:

<code xml>
  
  <?xml version="1.0" encoding="utf-8" ?>
  <rsp stat="ok">
    [xml-payload-here]
  </rsp>
  
</code>
 
If an error occurs, the following is returned:

<code xml>
  
  <?xml version="1.0" encoding="utf-8" ?>
  <rsp stat="fail">
    <err code="[error-code]" msg="[error-message]" />
  </rsp>
</code>