title: Lucene hibernate search NumericRangeQuery<Float> not working on field defined with @NumericField
body: <p>I use hibernate search 4.1.0 with good results except for this problem.
  I´m trying to perform a range search in a column defined:</p>
  
  <pre><code>@Field(name = "startTime", store = Store.YES)
  @NumericField
  public Float startTime;
  </code></pre>
  
  <p>I have stored an item with startTime = 0.0f;</p>
  
  <p>then I try to perform a range query:</p>
  
  <pre><code>NumericRangeQuery&lt;Float&gt; rangeQuery = NumericRangeQuery.newFloatRange(
                  "startDate", -100000.0f, +100000.0f, true, true);
  FullTextQuery fullTextQuery = fullTextEntityManager
                  .createFullTextQuery(rangeQuery, Item.class);
  results = fullTextQuery.getResultList();
  </code></pre>
  
  <p><strong>First</strong>: I have no results.</p>
  
  <p><strong>Second</strong>: Inspecting the index with lukeall, I see simply stored what seems to be the toString() [judging by other experiments too], which looks not normal...</p>
  
  <p>I feel like I´m missing something, any help would be appreciated.
  Thanks</p>