'pulls comments NUM' shows comments. Comments are not shown by default.

This really helps when I want to quickly lookup information about a PR,
but it has lots of comments so I have to `| head`.
issues: adding newlines on Printf's

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
Merge pull request #126 from vbatts/vbatts-newline

issues: adding newlines on Printf's
Merge pull request #123 from shykes/pr_out_pulls_comments_num_shows_comments_comments_are_not_shown_by_default
Qualify error messages to make them more useful.
Merge pull request #127 from shykes/pr_out_qualify_error_messages_to_make_them_more_useful
git remote: "origin" is not always the remote

Adding a top level flag for `pulls` and `issues` to specify an alternate
git remote (default is still "origin"). This took a little rearranging
of the Manager code, to be inside the app.Action (so the flags are
parsed at that point).

Now you can `pulls --remote crosbymichael` to see those instead of the
dotcloud list.

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
remotes: process the manager in the Before context

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
Merge pull request #128 from vbatts/vbatts-remote_flag