Added coverage conf.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Fixed path DJANGO_SETTINGS_MODULE in wsgi.py.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Supported Django 1.7.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>