Add more informational error message after composer install / before password enter.

[davidceraso]

After the composer install command in terminal, users who attempt to load a project are presented with:

This could be a more informational message that users need to copy off config.example.php and create new config.php with correct url and password credentials.

[matthewpizza]

@davidceraso Agreed!

[matthewpizza]

Looping back to this, I think this project has a nice getting started setup: https://github.com/cashmusic/platform