"Rock star" and "ninja" are red flags and/or cliches

Per http://lwn.net/Articles/552848/, terms like "rock star" and "ninja"
may elicit negative reactions from a more diverse community. In
addition, the terms have been overused (a search for "rock star ninja"
will provide evidence of a fair amount of backlash against said terms).

Thus, a more direct statement that also retains the second-person usage
of "you" elsewhere in the same page.

Signed-off-by: Dan Scott <dan@coffeecode.net>
Merge pull request #292 from dbs/less_rockstar

"Rock star" and "ninja" are red flags and/or cliches