title: ImportError: cannot import name force_text
body: <p>I have installed Python 2.7 and Django 1.4 in my CentOS machine and installed all dependencies for my existing project. When I run <code>python manage.py runserver</code>, I am getting the following traceback in my console</p>
  
  <pre><code>[root@localhost bv]# python manage.py runserver
  Validating models...
  
  Unhandled exception in thread started by &lt;bound method Command.inner_run of &lt;django.contrib.staticfiles.management.commands.runserver.Command object at 0x8ddd7ec&gt;&gt;
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 91, in inner_run
      self.validate(display_num_errors=True)
    File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 266, in validate
      num_errors = get_validation_errors(s, app)
    File "/usr/local/lib/python2.7/site-packages/django/core/management/validation.py", line 30, in get_validation_errors
      for (app_name, error) in get_app_errors().items():
    File "/usr/local/lib/python2.7/site-packages/django/db/models/loading.py", line 158, in get_app_errors
      self._populate()
    File "/usr/local/lib/python2.7/site-packages/django/db/models/loading.py", line 67, in _populate
      self.load_app(app_name)
    File "/usr/local/lib/python2.7/site-packages/django/db/models/loading.py", line 88, in load_app
      models = import_module('.models', app_name)
    File "/usr/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
      __import__(name)
    File "/usr/local/lib/python2.7/site-packages/debug_toolbar/models.py", line 6, in &lt;module&gt;
      from debug_toolbar.toolbar.loader import load_panel_classes
    File "/usr/local/lib/python2.7/site-packages/debug_toolbar/toolbar/loader.py", line 12, in &lt;module&gt;
      from debug_toolbar.utils.settings import CONFIG
    File "/usr/local/lib/python2.7/site-packages/debug_toolbar/utils/__init__.py", line 9, in &lt;module&gt;
      from django.utils.encoding import force_text
  ImportError: cannot import name force_text
  </code></pre>