title: TemplateSyntaxError: 'settings_tags' is not a valid tag library
body: <p>i got this error when i try to run this test case: WHICH IS written in tests.py of my django application:</p>
  
  <pre><code>def test_accounts_register( self ):
      self.url = 'http://royalflag.com.pk/accounts/register/'
      self.c = Client()
      self.values = {
          'email': 'bilal@gmail.com',
          'first_name': 'bilal',
          'last_name': 'bash',
          'password1': 'bilal',
          'password2': 'bilal',
      }
      self.response = self.c.post( self.url, self.values )
  </code></pre>
  
  <p>my django version is 1.2.1 and python 2.6 and satchmo version is 0.9.2-pre hg-unknown</p>
  
  <p>the complete error log is:</p>
  
  <pre><code>    .E....
  ======================================================================
  ERROR: test_accounts_register (administration.tests.AccountsRegisterTestCase)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "C:\pytho\satchmo\administration\tests.py", line 53, in test_accounts_reg
  ister
      self.response = self.c.get( self.url )
    File "C:\django\django\test\client.py", line 290, in get
      response = self.request(**r)
    File "C:\django\django\test\client.py", line 230, in request
      response = self.handler(environ)
    File "C:\django\django\test\client.py", line 74, in __call__
      response = self.get_response(request)
    File "C:\django\django\core\handlers\base.py", line 141, in get_response
      return self.handle_uncaught_exception(request, resolver, sys.exc_info())
    File "C:\django\django\core\handlers\base.py", line 180, in handle_uncaught_ex
  ception
      return callback(request, **param_dict)
    File "C:\django\django\views\defaults.py", line 23, in server_error
      t = loader.get_template(template_name) # You need to create a 500.html templ
  ate.
    File "C:\django\django\template\loader.py", line 157, in get_template
      template, origin = find_template(template_name)
    File "C:\django\django\template\loader.py", line 134, in find_template
      source, display_name = loader(name, dirs)
    File "C:\django\django\template\loader.py", line 42, in __call__
      return self.load_template(template_name, template_dirs)
    File "C:\django\django\template\loader.py", line 48, in load_template
      template = get_template_from_string(source, origin, template_name)
    File "C:\django\django\template\loader.py", line 168, in get_template_from_str
  ing
      return Template(source, origin, name)
    File "C:\django\django\template\__init__.py", line 158, in __init__
      self.nodelist = compile_string(template_string, origin)
    File "C:\django\django\template\__init__.py", line 186, in compile_string
      return parser.parse()
    File "C:\django\django\template\__init__.py", line 282, in parse
      compiled_result = compile_func(self, token)
    File "C:\django\django\template\defaulttags.py", line 921, in load
      (taglib, e))
  TemplateSyntaxError: 'settings_tags' is not a valid tag library: Template librar
  y settings_tags not found, tried django.templatetags.settings_tags,satchmo_store
  .shop.templatetags.settings_tags,django.contrib.admin.templatetags.settings_tags
  ,django.contrib.comments.templatetags.settings_tags,django.contrib.humanize.temp
  latetags.settings_tags,livesettings.templatetags.settings_tags,sorl.thumbnail.te
  mplatetags.settings_tags,satchmo_store.contact.templatetags.settings_tags,tax.te
  mplatetags.settings_tags,pagination.templatetags.settings_tags,product.templatet
  ags.settings_tags,payment.templatetags.settings_tags,payment.modules.giftcertifi
  cate.templatetags.settings_tags,satchmo_utils.templatetags.settings_tags,app_plu
  gins.templatetags.settings_tags,tinymce.templatetags.settings_tags
  
  ----------------------------------------------------------------------
  Ran 6 tests in 47.468s
  
  FAILED (errors=1)
  Destroying test database 'default'...
  </code></pre>