Changed security config to have User entity as primary storage of
users

BCrypt is used for the password encoding
Users now implements UserInterface

Passwords are encoded and salts are saved correctly

passwordHash is now password

UserType form now doesn't insert useless fields
Changed hush title to a link back to the root

Login and github links now work correctly
Removed useless user registration twig layouts and /new path
Moved registration form to index page
Added basic login functionality with the default security controller and a login page
Merge branch 'develop' of github.com:daniel-bell/hush into develop