Implemented new base view vial.viev.BaseRegistrationView for all user registration views.

lib/hawat/blueprints/auth_dev/__init__.py

...ueprints/auth_dev/templates/registration/email_admins.txt

...prints/auth_dev/templates/registration/email_managers.txt

...blueprints/auth_dev/templates/registration/email_user.txt

lib/hawat/blueprints/auth_dev/test/__init__.py

lib/hawat/templates/registration/email_admins.txt

lib/hawat/templates/registration/email_managers.txt

lib/hawat/templates/registration/email_user.txt

lib/vial/test/__init__.py

lib/vial/view/__init__.py