update python-magic==0.4.6

[electroniceagle]

You get a very obscure error message "MagicException: no magic files loaded" when running the example project out of the box under OSX Mavericks. According to the posted issue, it happens in Linux distros also:
ahupp/python-magic#44

Recommend you change python-magic to use 0.4.6.

Internal Server Error: /elfinder/yawd-connector/default/default/
Traceback (most recent call last):
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/core/handlers/base.py", line 114, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/contrib/admin/views/decorators.py", line 17, in _checklogin
    return view_func(request, *args, **kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/views/decorators/csrf.py", line 57, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/views.py", line 101, in dispatch
    return super(ElfinderConnectorView, self).dispatch(*args, **kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/Django-1.6.2-py2.7.egg/django/views/generic/base.py", line 87, in dispatch
    return handler(request, *args, **kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/views.py", line 108, in get
    return self.output(self.get_command(request.GET), request.GET)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/views.py", line 79, in output
    return self.render_to_response(self.elfinder.execute(cmd, **args))
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/connector.py", line 153, in execute
    result = getattr(self, '_%s' % cmd)(**kwargs)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/connector.py", line 239, in _open
    files += self._volumes[id_].tree(exclude=target)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/volumes/base.py", line 511, in tree
    return dirs + self._get_tree(path, (deep - 1) if deep > 0 else (self._options['treeDeep'] - 1), excluded)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/volumes/base.py", line 1312, in _get_tree
    stat = self.stat(p)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/volumes/base.py", line 1149, in stat
    stat = self._stat(path)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/volumes/filesystem.py", line 144, in _stat
    stat['mime']  = 'directory' if dir_ else self.mimetype(path)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/volumes/base.py", line 1211, in mimetype
    mime = self._mimetype(path)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/yawd_elfinder-0.91.00_rc1-py2.7.egg/elfinder/volumes/filesystem.py", line 179, in _mimetype
    return magic.Magic(mime=True).from_file(path.encode('utf-8')) #unicode filename support
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/python_magic-0.4.3-py2.7.egg/magic.py", line 51, in __init__
    magic_load(self.cookie, magic_file)
  File "/Users/bschott/.virtualenvs/yawd-elfinder/lib/python2.7/site-packages/python_magic-0.4.3-py2.7.egg/magic.py", line 138, in errorcheck
    raise MagicException(err)
MagicException: no magic files loaded