Add STDIN as an option to `openshift kube -c`

Also cleanup examples

@bparees
I'm torn on separate fixtures directories - the biggest problem is that it encourages reuse of that fixture from other places, which we don't always want.

> On Sep 22, 2014, at 12:09 PM, Maciej Szulik <notifications@github.com> wrote:
> 
> In examples/guestbook/config.json:
> 
> > @@ -1,131 +0,0 @@
> > -{
> It would make sense to move it pkg/config/fixtures/ directory, similar to what we have in pkg/build/webhook/github/fixtures/. I guess the same problem is in pkg/template/template_test.go which uses examples/guestbook/template.json, this file exists though. Still I'd suggest creating pkg/template/fixtures.
> 
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