title: Elasticsearch is not sorting the results
body: <p>I'm having problem with an elasticsearch query.
  I want to be able to sort the results but elasticsearch is ignoring the sort tag. Here my query:</p>
  
  <pre><code>{
      "sort": [{
          "title": {"order": "desc"}
      }],
      "query":{
          "term": { "title": "pagos" }
      }
  }
  </code></pre>
  
  <p>However, when I remove the query part and I send only the sort tag, it works.
  Can anyone point me out the correct way?</p>
  
  <p>I also tried with the following query, which is the complete query that I have:</p>
  
  <pre><code>{
    "sort": [{
      "title": {"order": "asc"}
    }],
    "query":{
      "bool":{
        "should":[
          {
            "match":{
              "title":{
                "query":"Pagos",
                "boost":9
              }
            }
          },
          {
            "match":{
              "description":{
                "query":"Pagos",
                "boost":5
              }
            }
          },
          {
            "match":{
              "keywords":{
                "query":"Pagos",
                "boost":3
              }
            }
          },
          {
            "match":{
              "owner":{
                "query":"Pagos",
                "boost":2
              }
            }
          }
        ]
      }
    }
  }
  </code></pre>
  
  <p><strong>Settings</strong></p>
  
  <pre><code>{
    "settings": {
      "analysis": {
        "filter": {
          "autocomplete_filter": {
            "type": "ngram",
            "min_gram": 3,
            "max_gram": 15,
            "token_chars": [
              "letter",
              "digit",
              "punctuation",
              "symbol"
            ]
          }
        },
        "analyzer": {
          "default" : {
            "tokenizer" : "standard",
            "filter" : ["standard", "lowercase", "asciifolding"]
          },
          "autocomplete": {
            "type": "custom",
            "tokenizer": "standard",
            "filter": [
              "lowercase",
              "asciifolding",
              "autocomplete_filter"
            ]
          }
        }
      }
    }
  }
  </code></pre>
  
  <p><strong>Mappings</strong></p>
  
  <pre><code>{
    "objects": {
      "properties": {
        "id":             { "type": "string", "index": "not_analyzed" },
        "type":           { "type": "string" },
        "title":          { "type": "string", "boost": 9, "analyzer": "autocomplete", "search_analyzer": "standard" },
        "owner":          { "type": "string", "boost": 2 },
        "description":    { "type": "string", "boost": 4 },
        "keywords":       { "type": "string", "boost": 1 }
      }
    }
  }
  </code></pre>
  
  <p>Thanks in advance!</p>