Clean up README in ci-scripts/ directory
Clean up README in ci-scripts/ directory

Reflow some of the content so that it wraps nicely to 80 chars. Also adjust
some of the indenting, formatting, and general small tweaks to the wording.

Change-Id: I5397356b802c3a06762dfae524bb1ba1ea634972

jkilpatr/browbeat,jkilpatr/browbeat