title: How to get the data value in Jstree
body: <p>I tried to get the data for the selected node in jstree. 
  I can able to get the ID using data.rslt.obj.attr('id')
  But if i want to retrieve the email id of user101,
  How to get the data values according to selected node?
  I tried data.rslt.obj.attr('data'), but not able to achieve, please advise.</p>
  
  <pre><code>{
     "state":"open",
     "data":"com",
     "attr":{
        "id":"test1",
     },
     "children":[
        {
           "state":"open",
           "attr":{
              "id":"testus1",
           },
           "data":{
              "title":"vls",
              "emailAddress":"vls@gmail.com"
           },
           "children":[
              {
                 "state":"closed",
                 "attr":{
                    "id":"testus2",
                 },
                 "data":{
                    "title":"vfg"
                 },
                 "children":[
                    null,
                    {
                       "state":"closed",
                       "attr":{
                          "id":"testus3",
                       },
                       "data":{
                          "title":"user19"
                       },
                       "children":[
                          {
                             "state":"closed",
                             "attr":{
                                "id":"user101",
                             },
                             "data":{
                                "title":"user101",
                                "emailAddress":"test1@csc.com"
                             }
                          },
                          {
                             "state":"closed",
                             "attr":{
                                "id":"testus11",
                             },
                             "data":{
                                "title":"testuser11",
                                "emailAddress":"test@csc.com"
                             },
                          }
                       ]
                    }
                 ]
              },
              null
           ]
        },
        null
     ]
  }
  
  Regards,
  Prabkar
  </code></pre>