I learn Django. And now I try to make new database table. I have done the structure of the files, as in the book, which I learn. My app is named - "books":

Then, I must add the line ‘mysite.books’ to field INSTALLED_APPS, in settings.py, isn`t it? Also, in the book, written, that I must comment out next lines in the file "settings.py":
MIDDLEWARE_CLASSES = (
# ‘django.middleware.common.CommonMiddleware’,
# ‘django.contrib.sessions.middleware.SessionMiddleware’,
# ‘django.contrib.auth.middleware.AuthenticationMiddleware’,
)
INSTALLED_APPS = (
# ‘django.contrib.auth’,
# ‘django.contrib.contenttypes’,
# ‘django.contrib.sessions’,
# ‘django.contrib.sites’,
‘mysite.books’,
)
But, the book about Django, is for 1.1 version of Django, and I use the 1.8 version of Django. So, I have some another fields "MIDDLEWARE_CLASSES" and "INSTALLED_APPS":
INSTALLED_APPS = (
#'django.contrib.admin',
#'django.contrib.auth',
#'django.contrib.contenttypes',
#'django.contrib.sessions',
#'django.contrib.messages',
#'django.contrib.staticfiles',
'mysite.books',
)
MIDDLEWARE_CLASSES = (
#'django.contrib.sessions.middleware.SessionMiddleware',
#'django.middleware.common.CommonMiddleware',
#'django.middleware.csrf.CsrfViewMiddleware',
#'django.contrib.auth.middleware.AuthenticationMiddleware',
#'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
#'django.contrib.messages.middleware.MessageMiddleware',
#'django.middleware.clickjacking.XFrameOptionsMiddleware',
#'django.middleware.security.SecurityMiddleware',
)
And, if I run the command "python manage.py validate", i see the error: "ImportError: No module named 'mysite.books'"
What I do wrong? Or, maybe it is the problem with different versions of Django? What I must doing?