Active plugin depends on 'django.middleware.locale.LocaleMiddleware' in settings.MIDDLEWARE_CLASSES
Fix some style error includes formset and login icons.
Fix send error user message display error.
Merge pull request #59 from wbcyclist/master

fix widget delete bug
fix widget delete bug

fix widget delete bug
Improve Dashboard widget management.
Improve Dashboard widget management.
Merge branch 'master' of github.com:sshwsfc/django-xadmin
Fix formsets style
Fix quickform refresh bug, Fixed #57
Fix filters and data ist js bugs.
Fix nav-accordion position.
Merge branch 'master' of github.com:sshwsfc/django-xadmin
Support method or func action.
Use ajax select for User field default style.
Add django comment component.
Add Generic Inline admin support. Fixed #42

Generic Inline Admin Demo:

```python
# Use django Comment Model for example
from django.contrib.comments.models import Comment

class CommentInline(object):
    generic_inline = True  # important to tell xadmin is a generic inline admin
    ct_fk_field = "object_pk"  # and ct_field for content_type field name, default is 'content_type'
    model = Comment
    extra = 1
    style = 'tab'  # other values: `one`, `table`, `accordian` or just forget this attr

class XXXAdmin(object):
    ...
    inlines = [CommentInline]
```
Fix django1.4 can't get user model error.
Active Comment admin when it in INSTALLED_APPS
Fix site menu style bugs.