message: Added extra details around setting up admin user
  after running create-admin the user will be prompted to provide extra details and set the admin password
diff: @@ -80,7 +80,7 @@ Follow these few simple steps to install Superset.::
  # Install superset
  pip install superset
  - # Create an admin user
  + # Create an admin user (you will be prompted to set username, first and last name before setting a password)
  fabmanager create-admin --app superset
  # Initialize the database
  