Add password reset urls and templates

opentech/apply/urls.py

opentech/apply/users/urls.py

opentech/apply/users/views.py

opentech/settings/base.py

opentech/users/templates/users/account.html

opentech/users/templates/users/password_reset/complete.html

opentech/users/templates/users/password_reset/confirm.html

opentech/users/templates/users/password_reset/done.html

opentech/users/templates/users/password_reset/email.txt

opentech/users/templates/users/password_reset/form.html