logout from get to post (security)

app/vkk/static/styles/style2.css

app/vkk/templates/base.html

app/vkk/templates/registration/password_change_done.html

app/vkk/templates/registration/password_change_form.html

app/vkk/templates/vkk/customtags/nav.html

app/vkk/templates/vkk/users/user_details_change_done.html

app/vkk/templatetags/customtags.py