Add step-by-step guide on transferring repos into the organization

[joyeecheung]

Fixes: #63

The first commit moves the travis integration guide in nodejs/automation here.

The second commit moves the npm management documentation here.

The third commit adds a step-by-step guide on transferring repositories into the organization.

nodejs/TSC#495 (updating the repo management policy from "a simple majority is needed to transfer a repo" to "approval after 72 hours without objection") should land before this could land.

I can open PRs in the automation repo and the build repo to update the original docs with a pointer to the documents here after this lands.

[joyeecheung]

cc @nodejs/tsc @nodejs/community-committee

[watilde]

We might also can mention that developers should enable 2FA on npm as well here.

[joyeecheung]

@watilde The foundation account does not even enable 2FA on npm (can we fix that?) ...so probably not really worth mentioning that for now

[watilde]

I thought it's the same situation with @nodejs-github-bot account without 2FA in GitHub and collaborators need to enable their 2FA. We can mention later after landing this.

[joyeecheung]

This has dragged long enough....sorry. I removed the guide on travis since we can now use the travis GitHub app - I'll add a new guide later (or maybe @targos or @Trott can do that?). Meanwhile, I think we can land the transfer guide and the npm management documentation first.

PTAL.

[targos]

this is a dead link

[joyeecheung]

Addressed some of the reviews from @watilde and @targos.

I think this should be ready to land?

[targos]

LGTM once the link is fixed

[mhdawson]

LGTM