Run django application without django.contrib.admin
I have resolved this issue. 
I had #url(r'^admin/', include(admin.site.urls)), in my urls.py which I just commented out.
I am trying to run my Django Application without Django admin panel because I don't need it right now but getting an exception value:

Put 'django.contrib.admin' in your INSTALLED_APPS setting in order to
  use the admin application.

Could I ran my application without django.contrib.admin ? Even if go my localhost:8000 it is showing you need to add django.contrib.admin in your installed_apps?