Update install script(s)

[Patrick McKenna]

@github/training-teachers We don't currently list the dependencies needed by some of these scripts, or have any scripts to install those deps. (I didn't even realize this until this morning, when I couldn't run add-collaborators because I recently reinstalled OS X and didn't have octokit installed.)

Question the first: should we add that? I vote yes.

Question two: should we just modify the Rakefile, or should we follow the conventions of Scripts to Rule Them All? (We'd omit the unneeded bits from the latter, of course, e.g. script/console.) I vote for the second path, for consistency's sake, something that's especially important for new users and new hires.

Thoughts?

[Brent Beer]

👍 for adding that
👍 for dependencies listed in scripts. especially making sure the folder is /script, and ./script/bootstrap would bail if octokit wasn't setup, etc

[Cynthia Rich]

@patrickmckenna - thank you so much for your 👀 for these details.

Question the first: should we add that?

👍

should we follow the conventions of Scripts to Rule Them All?

I 👍 option B