Create a new project in the current directory using "laravel new ."

[SjorsO]

If you want to create a new laravel project in an existing directory, you have to use laravel new (without a path). If you try using laravel new ., like you would with most command line utilities, you get an error "Application already exists!".

This PR makes it possible to create a new laravel project in the current directory using laravel new .