status: handle errors when writing output

[darkowlzz]

The outputters in status.go are ignoring the error returned while writing the output. These errors should be handled and not ignored. Some of the functions that are returning error are fmt.Fprintf(), json.Encoder.Encode() and template.Template.Execute().

[JamieCrisman]

I'd like to tackle this one if it's okay. If I don't have anything by mid-next I'll release it for someone else to take.