[Live-demo] Linking metrics page into OSGeoLive docs

[Hamish]

Cameron:

> I'm erring toward putting into the "Contents" page (which is of 
> less prominence than having its own tab). Any comments?

I agree.


a couple questions-

- how to note when we know it's wrong? (e.g. opencpn didn't abruptly die it just moved to git and ohloh doesn't know about that yet)

- how to detect if offline and/or javascript is disabled, and print a message saying that instead of just a blank page?


thanks,
Hamish