网站目录规范：
dazatu/
   -README
   -settings.py
   -urls.py
   -APP1/
   -APP2/
   ...
   -APPn/
   +docs/
       #This will hold the documentation for your project
   +static/
       #In production this will be the root of your MEDIA_URL
       +styles/
       +scripts/
       +images/
   +tests/
       #Project level tests (Each app should also have tests)
   +uploads/
       +content imgs, etc
   +templates/
       #This area is used to override templates from your reusable apps
       +flatpages/
       +comments/
       +example/
       +app1/
       +app2/
       +appN/