display labels by default, not only in "detailed" mode

[zevaverbach]

I suggest that labels are useful to see most of the time, and if #549 is also implemented, they won't take up too much room.

[protoEvangelion]

Since users often parse the output of the gh cmds, this would be a breaking change.
What do you think of offering that option in the ~/.gh.json file.
Something like:

{
  "version": "1.11.4",
  "cmds": {
    "issue": {
      "showLabels": true
    }
  }

[zevaverbach]

@protoEvangelion I like it. Want me to do a PR with that?

[protoEvangelion]

That would be great! You can add that onto your currently open PR if you would prefer.

[protoEvangelion]

Actually since the labels not showing on the detailed flag is a separate issue, I went ahead and merged that. So if you could send a new PR that would be great!

[protoEvangelion]

Currently labels are showing with the --detailed flag. We will revisit adding labels to gh is once we begin this #613