title: Django shop error: "No module named shop"
body: <p>When I'm launching a django shop I receive an error message: <code>ImportError: No module named shop</code>.</p>
  
  <ol>
  <li>I've switched to my project dir;</li>
  <li>activated <code>virtualenv</code>;</li>
  <li>installed <code>django-shop</code>, using <code>pip install django-shop</code>;</li>
  <li>added module <code>shop</code> to <code>settings.py</code> in my project directory;</li>
  <li>added a string <code>(r'^shop/', include('shop.urls')),</code> in my <code>urls.py</code>.</li>
  </ol>
  
  <p>All worked with no error. Any advises how to solve that problem?</p>
  
  <p>Installed apps list from settings.py:</p>
  
  <pre><code>'INSTALLED_APPS = (
  'djangocms_admin_style',
  'djangocms_text_ckeditor',
  'django.contrib.auth',
  'django.contrib.contenttypes',
  'django.contrib.sessions',
  'django.contrib.admin',
  'django.contrib.sites',
  'django.contrib.sitemaps',
  'django.contrib.staticfiles',
  'django.contrib.messages',
  'cms',
  'menus',
  'sekizai',
  'treebeard',
  'djangocms_style',
  'djangocms_column',
  'djangocms_file',
  'djangocms_flash',
  'djangocms_googlemap',
  'djangocms_inherit',
  'djangocms_link',
  'djangocms_picture',
  'djangocms_teaser',
  'djangocms_video',
  'reversion',
  'shop',
  'shop.addressmodel',
  'eshop',
  </code></pre>
  
  <p>)'</p>
  
  <p>Here is <code>pip freeze --local</code> results:</p>
  
  <pre><code>dj-database-url==0.3.0
  Django==1.7.10
  django-classy-tags==0.6.2
  django-cms==3.1.2
  django-reversion==1.8.5
  django-sekizai==0.8.2
  Django-Select2==4.3.1
  django-treebeard==3.0
  djangocms-admin-style==0.2.7
  djangocms-column==1.5
  djangocms-file==0.1
  djangocms-flash==0.2.0
  djangocms-googlemap==0.3
  djangocms-inherit==0.1
  djangocms-installer==0.7.9
  djangocms-link==1.6.2
  djangocms-picture==0.1
  djangocms-style==1.5
  djangocms-teaser==0.1
  djangocms-text-ckeditor==2.6.0
  djangocms-video==0.1
  html5lib==0.999999
  Pillow==2.9.0
  pytz==2015.4
  six==1.9.0
  tzlocal==1.2
  wheel==0.24.0
  </code></pre>
  
  <p>Traceback from terminal:</p>
  
  <pre><code>Traceback (most recent call last):
    File "manage.py", line 10, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/home/stp/web/eshop/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
      utility.execute()
    File "/home/stp/web/eshop/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 354, in execute
      django.setup()
    File "/home/stp/web/eshop/env/local/lib/python2.7/site-packages/django/__init__.py", line 21, in setup
      apps.populate(settings.INSTALLED_APPS)
    File "/home/stp/web/eshop/env/local/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate
      app_config = AppConfig.create(entry)
    File "/home/stp/web/eshop/env/local/lib/python2.7/site-packages/django/apps/config.py", line 87, in create
      module = import_module(entry)
    File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
      __import__(name)
  ImportError: No module named shop
  </code></pre>