Possible README Issue.

[jeffanthony]

In the 'Install Drupal' section we find:
# Create a configuration export directory. This is not required, but very usefull.
mkdir drupal/config

I was going to delete the extra 'l' in useful but a few lines down we find --config-dir="../config" which I did not confirm but appears that it would break if that directory doesn't exist. I suggest deleting " This is not required, but very usefull. "