title: Proper use of the rootProperty in Sencha Touch 2
body: <p>I am trying to use the rootProperty value in a Sencha Touch 2 store to load some JSON I retrieved from the Foursquare Venues API and for the life of me I cannot get it to work.</p>
  
  <p>According to the docs I should setup my rootProperty in dot notation to equal "response.venues" but it does not populate the list. I put the json in a separate file and removed the "response" and "venues" headers and it worked fine. There must be something blatantly obvious I'm missing here as I can't find a straight answer anywhere.</p>
  
  <p>My model:</p>
  
  <pre><code>Ext.define('App.model.4SqVenue', {
  extend: 'Ext.data.Model',
  
  config: {
      fields: [
          {name: 'name', id: 'id'}
      ]
  }
  });
  </code></pre>
  
  <p>My store:</p>
  
  <pre><code>Ext.define('App.store.4SqVenues', {
  extend: 'Ext.data.Store',
  requires: [
      'App.model.4SqVenue'
  ],
  
  config: {
      model: 'App.model.4SqVenue',
      storeId: '4SqVenuesStore',
  
      proxy: {
          type: 'jsonp',
          url: 'foursquare venue request',
          reader: {
              type: 'json',
              rootProperty: 'response.venues'
          }
      }
  }
  });
  </code></pre>
  
  <p>My view:</p>
  
  <pre><code>Ext.define('App.view.4SqVenues', {
  extend: 'Ext.List',
  xtype: '4SqVenuesCard',
  requires: [
      'App.store.4SqVenues'
  ],
  
  config: {
      fullscreen: true,
      itemTpl: '{name}',
      store: '4SqVenuesStore'
  }
  });
  </code></pre>
  
  <p>The response from the 4sq API:</p>
  
  <pre><code>{
  "meta": {
      "code": 200
  },
  "response": {
      "venues": [
          {
              "id": "4a3ad368f964a52052a01fe3",
              "name": "Four Peaks Brewing Company",
              "contact": {
                  "phone": "4803039967",
                  "formattedPhone": "(480) 303-9967",
                  "twitter": "4PeaksBrewery"
              },
              "location": {
                  "address": "1340 E 8th St",
                  "crossStreet": "at Dorsey Ln.",
                  "lat": 33.4195052281187,
                  "lng": -111.91593825817108,
                  "distance": 1827,
                  "postalCode": "85281",
                  "city": "Tempe",
                  "state": "AZ",
                  "country": "United States"
              },
              "categories": [
                  {
                      "id": "4bf58dd8d48988d1d7941735",
                      "name": "Brewery",
                      "pluralName": "Breweries",
                      "shortName": "Brewery",
                      "icon": {
                          "prefix": "https://foursquare.com/img/categories/nightlife/brewery_",
                          "sizes": [
                              32,
                              44,
                              64,
                              88,
                              256
                          ],
                          "name": ".png"
                      },
                      "primary": true
                  }
              ],
              "verified": true,
              "stats": {
                  "checkinsCount": 24513,
                  "usersCount": 8534,
                  "tipCount": 235
              },
              "url": "http://www.fourpeaks.com",
              "likes": {
                  "count": 0,
                  "groups": []
              },
              "menu": {
                  "type": "foodAndBeverage",
                  "url": "https://foursquare.com/v/four-peaks-brewing-company/4a3ad368f964a52052a01fe3/menu",
                  "mobileUrl": "https://foursquare.com/v/4a3ad368f964a52052a01fe3/device_menu"
              },
              "specials": {
                  "count": 0,
                  "items": []
              },
              "hereNow": {
                  "count": 1,
                  "groups": [
                      {
                          "type": "others",
                          "name": "Other people here",
                          "count": 1,
                          "items": []
                      }
                  ]
              }
          }
      ]
  }
  }
  </code></pre>