JSON Element support

[RackerWilliams]

Elements can be handled a number of ways...

One example is to bind a namespace to a pattern

<rax:json-element namespace="http://rackspace.com/" path="$_?type"/>

That means that if I see

<wadl:representation mediaType="application/json" element="rax:widget"/>

...where rax is bound to http://rackspace.com/

then we'd expect

{ "type" : "widget",
   "name" : "My Widget" 
 }

The other pattern should be to wrap...

<rax:json-element namespace="http://rackspace.com/" wrap="true"/>

Then we'd expect :

{ "widget" : { "name" : "My Widget"}}

I'd say wrap and path are mutually exclusive attributes.