title: 'SortedDict' object has no attribute 'insert'
body: <p>After deploying AskBot I observe an unusual error:</p>
  
  <blockquote>
    <p>AttributeError at /settings/QA_SITE_SETTINGS/<br>
       'SortedDict' object has no attribute 'insert'</p>
  </blockquote>
  
  <p>This is the result of the following code:</p>
  
  <pre><code>langs_dict = SortedDict(django_settings.LANGUAGES)
  default_code = django_settings.LANGUAGE_CODE
  default_name = langs_dict[default_code]
  langs_dict.insert(0, default_code, default_name) 
  </code></pre>
  
  <p>According to <a href="https://code.djangoproject.com/wiki/SortedDict" rel="nofollow">Django wiki</a>, <code>SortedDict</code> seems to have <code>insert</code> method.</p>
  
  <p>Any idea?</p>
  
  <p><sub>
  Here is the complete <a href="http://htmlpreview.github.io/?https://gist.githubusercontent.com/amirgon/4cee430a181104568643/raw/dc61d7c118fcf7bacd757edf54dd8b7642aa96ad/AttributeError%2520at%2520_settings_QA_SITE_SETTINGS_.html" rel="nofollow">error page</a>.<br>
  Related: <a href="https://github.com/ASKBOT/askbot-devel/issues/517" rel="nofollow">AskBot bug</a>.
  </sub></p>