Raw network handler

Raw handler now parses an optional json file with the network interface information, and emits network stats.
Vishnu asked to add this error msg I think, but I can remove it.
On Oct 15, 2014 2:46 PM, "Victor Marmol" <notifications@github.com> wrote:

> In container/raw/handler.go:
>
> > @@ -49,6 +52,20 @@ func newRawContainerHandler(name string, cgroupSubsystems *cgroupSubsystems, mac
> >  	if err != nil {
> >  		return nil, err
> >  	}
> > +	cHints, err := getContainerHintsFromFile(*argContainerHints)
> > +	if err != nil {
> > +		glog.Fatalf("Error unmarshalling json %s Error: %s", *argContainerHints, err)
>
> We should just return nil, err here
>
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> <https://github.com/google/cadvisor/pull/270/files#r18925466>.
>