More clear instructions for Cloud Foundry

[katheris]

Need clearer instructions for how to get set up to push to Cloud Foundry and the container service. Stumbling blocks were:

• unclear what the pre-reqs are (e.g. you need CLI but not devops)
• confusion about why the IBM container service plugin is required, and why you need Docker for it
• users struggled to log into cloud foundry, maybe document the bluemix profile as a backup approach?

[ebullient]

Has this been addressed here: https://book.game-on.org/walkthroughs/bluemix-cf.html