TPT3 - add tomany keys

tomany.json

{
   "meta":{
      "limit":20,
      "next":null,
      "offset":0,
      "previous":null,
      "total_count":1
   },
   "objects":[
      {
         "id":1,
         "item_count":2,
         "item_urls":[
            "/api/v1/item/1/",
            "/api/v1/item/2/"
         ],
         "items":[
            {
               "id":1,
               "text":"Learn TastyPie"
            },
            {
               "id":2,
               "text":"Finish this tut"
            }
         ],
         "name":"My first TODO list",
         "resource_uri":"/api/v1/list/1/"
      }
   ]
}