day67 django debug toolbar安装

1. 安装：python：pip install django-debug-toolbar
2. setting里操作这些：

• INSTALLED_APPS里加上'debug_toolbar'
• 加上INTERNAL_IPS = ['127.0.0.1',]
• MIDDLEWARE 里加上'debug_toolbar.middleware.DebugToolbarMiddleware',
• 加上STATICFILES_DIRS = ( os.path.join(BASE_DIR,'static'), )

urls.py里：

from django.conf import settings,include
if settings.DEBUG:
    import debug_toolbar
    urlpatterns += [
        url(r'^__debug__/', include(debug_toolbar.urls)),
    ]