title: Order by in relations PROPEL
body: <p>I have:</p>
  
  <pre><code># config/schema.yml
  propel:
    jobeet_category:
      id:           ~
      name:         { type: varchar(255), required: true, index: unique }
  
    jobeet_job:
      id:           ~
      category_id:  { type: integer, foreignTable: jobeet_category, foreignReference: id, required: true }
      type:         { type: varchar(255) }
      company:      { type: varchar(255), required: true }
  </code></pre>
  
  <p>for example:</p>
  
  <pre><code>JobeetCategory:
  
  id | name
  1  | first
  2  | second
  
  JobeetJob:
  
  id | category_id | name
  1  | 1           | bbb
  2  | 1           | ccc
  3  | 1           | aaa
  4  | 2           | zzz
  5  | 2           | xxx
  </code></pre>
  
  <p>and I do:</p>
  
  <pre><code>$c = new Criteria();
  $categories = JobeetCategoryPeer::doSelect($c);
  </code></pre>
  
  <p>and I can:</p>
  
  <pre><code>foreach($categories as $category){
  
    echo $category-&gt;getName();
    foreach ($category-&gt;getJobeetJobs() as $job){
            echo '-' . $job-&gt;getName();
    }
  }
  </code></pre>
  
  <p>this show me:</p>
  
  <pre><code> first
   - bbb
   - ccc
   - aaa
   second
   - zzz
   - xxx
  </code></pre>
  
  <p>but I would like have this sorted <code>ASC by NAME</code>:</p>
  
  <pre><code> first
   - aaa
   - bbb
   - ccc
   second
   - xxx
   - zzz
  </code></pre>
  
  <p>how can I make it with PROPEL QUERY?</p>