Improperly packaged distribution at PyPI

Hi Brett,

I've tried pip install django-pq and find out that some subpackages, like `compat' are missed, when tried to apply migrations and syncdb: 
```
Traceback (most recent call last):
  File "manage.py", line 19, in <module>
    execute_from_command_line(sys.argv)
  File "/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 453, in execute_from_command_line
    utility.execute()
  File "/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 272, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 77, in load_command_class
    module = import_module('%s.management.commands.%s' % (app_name, name))
  File "/env/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/env/lib/python2.7/site-packages/south/management/commands/__init__.py", line 10, in <module>
    import django.template.loaders.app_directories
  File "/env/lib/python2.7/site-packages/django/template/loaders/app_directories.py", line 25, in <module>
    raise ImproperlyConfigured('ImportError %s: %s' % (app, e.args[0]))
django.core.exceptions.ImproperlyConfigured: ImportError pq: No module named compat
```
Please merge my pull request, because I think it will help.