Login/Logout View and templates (local)

[arruda]

Create the Login and logout view, along with templates (simple forms such as the login form on FarmOS demo), using only local authentication (instead of gatekeeper) for now. Also necessary to create a new base.html template for the service.

[arruda]

Create a simple logout, again, similar to login, it should actually redirect to gatekeeper/logout URL, so maybe not really needed a logout template, just imidiatly logout the user if no gatekeeper is set (in dev mode for example). But still would need the logout view for that