New feature: Add a new config to allow people to access with the standar...

...d WordPress login

The login form now shows a link that says "Login with WordPress username".
When the link is clicked it redirects to the same page but allowing the standard wordpress login and showing a link that says "Back to Auth0 login".

By default, this feature is enabled.

I didn't know if I may change the README.md file too so I keep it as it were.