Add docs to for installing test dependencies

Addresses #3386
Write a feature for creating a school

Some data that populates select menus in the form was not
populated in my development instance.  These steps are
commented out.

I haven't tried to run this scenario yet.

Addresses #3386
First pass at create school leader feature

This isn't completed as I have a number of questions about the
flow and how to make the association betweeen the school and the
leader.

Also, we'll need to implement actions for some of the steps, but
it seems that they can probably just be aliases for actions in
the Drupal Behat Extension.  I've left comments to identify these
cases.

Addresses #3386
First pass at create school profile feature

Addresses #3386