Successful login exit status when unsuccessful

[ddgenome]

Per @jpwarren in atomisthq/docs#161 :
I have an access token set up for providing access to my GitHub to external apps and for code push.

When doing rug login in the Tutorial, I attempted to use my GitHub access token instead of the actual password. The command silently fails, and the exit code is 0, so it looks like it succeeded, but it hasn't.

I don't think the personal access token was created and stored in ~/.atomist/cli.yml.