Improve introduction in config.md

* "24 hrs a day" is similar to "all-day every-day" so the logic of this being a differentiator isn't clear. 

* I think "here's the best practices" is grammatically incorrect when "here" isn't indicating a document providing a list of best practices but is instead referring to the plural "best practices" themselves being itemized within the same document as the statement.
"best practices on deploying" -> "... for deploying"
reduce jargony usage of "deploy" as a noun
better flow
Merge pull request #65 from hobson/master

Grammar improvements to config.md