title: Issues with elasticSearch geoPoint
body: <p>I'm using ElasticSearch 1.1.0, and trying to use the geodistance filter.</p>
  
  <p>Here is my mapping</p>
  
  <pre><code>{
  "dynamic": "true",
  "numeric_detection": true,
  "properties": {
      "address": {
          "type": "nested",
          "properties": {
              "city": {
                  "type": "string"
              },
              "country": {
                  "type": "string"
              },
              "location": {
                  "type": "geo_point"
              },
              "postcode": {
                  "type": "integer"
              },
              "region": {
                  "type": "string"
              },
              "state": {
                  "type": "string"
                  }
              }    
          }
      }
  }
  </code></pre>
  
  <p>Here is my document</p>
  
  <pre><code>"address": {
      "postcode": "29004",
      "city": "Málaga",
      "state": "Málaga",
      "region": "Málaga",
      "country": "espagne",
      "location": {
          "lat": 36.68676,
          "lon": -4.49028
      }
  }
  </code></pre>
  
  <p>(The mapping was created before indexing any document, and the document is well indexed). But when a try to fetch this annonce with the following query string </p>
  
  <pre><code>{
  "query": {
      "filtered": {
          "query": {
              "match_all": {
  
              }
          },
          "filter": {
              "geo_distance": {
                  "distance": "200km",
                  "address.location": {
                      "lat": 36.68676,
                      "lon": -4.49028
                  }
              }
          }
      }
  }
  }
  </code></pre>
  
  <p>I got no results.. I can not understand why. Am I doing something wrong ? Thanks for your help :) !</p>