Add details for changing settings via command line

[fooman]

Description

Add details to script the set up for Mftf

Fixed Issues (if relevant)

1. none

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/verification tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)
• Changes to Framework doesn't have backward incompatible changes for tests or have related Pull Request with fixes to tests

[coveralls]

Coverage increased (+0.7%) to 53.772% when pulling 4f87bf0 on fooman:patch-2 into 5a4909c on magento:develop.

[coveralls]

Coverage increased (+0.7%) to 53.772% when pulling 4f87bf0 on fooman:patch-2 into 5a4909c on magento:develop.

[coveralls]

Coverage increased (+0.7%) to 53.772% when pulling 4f87bf0 on fooman:patch-2 into 5a4909c on magento:develop.

[coveralls]

Coverage increased (+0.7%) to 53.799% when pulling 9776088 on fooman:patch-2 into 8ac2937 on magento:develop.