Demo updates

I've now updated all the non-apprtc WebRTC demos:
- tweaked HTML, CSS and JavaScript to validate with HTMLHint, CSSLint and JSHint 
- updated remaining demos to the new UI (though haven't done this for the face and desktopcapture demos)
- fixed various other minor wording and code formatting glitches.

@juberti @andresusanopinto @marwahvikas PTAL – but check my email first.
I've removed the Chrome Frame meta tag (and made a few extra whitespace
tweaks) in a new commit.

On Fri, Oct 24, 2014 at 5:10 PM, Justin Uberti <notifications@github.com>
wrote:

> In samples/web/content/apprtc/index.html:
>
> > @@ -14,7 +14,7 @@
> >
> >    <meta charset="utf-8">
> >    <meta name="description" content="WebRTC reference app">
> > -  <meta http-equiv="X-UA-Compatible" content="chrome=1">
> > +  <meta http-equiv="X-UA-Compatible" content="IE=edge">
>
> Yes, let's remove it. RIP, Chrome Frame.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/GoogleChrome/webrtc/pull/175/files#r19347955>.
>