update urls, run autopep8

.gitignore

src/account/urls.py

src/account/views.py

src/common/email.py

src/common/permissions.py

src/document/migrations/0001_initial.py

src/document/urls.py

src/groups/migrations/0001_initial.py

src/groups/urls.py

src/homework/urls.py

src/images/migrations/0001_initial.py

src/images/migrations/0002_auto_20200208_0254.py

src/images/models.py

src/images/urls.py

src/kszkepzes/settings/base.py

src/kszkepzes/settings/production.py

src/kszkepzes/urls.py

src/mentors/migrations/0001_initial.py

src/mentors/migrations/0002_auto_20200209_1955.py

src/mentors/urls.py