docs: replace all instances of node.js with io.js because trademark.

I doubt this is acceptable "as is" but it's a good starting point to talk about all the places the trademarked term "node.js" appears in the repo and what, in all, might need to be changed in order to remove it.
hmm, okay. Perhaps there needs to be a bigger comment at the start of that file notifying such?


On 4 Dec 2014, at 7:02 pm, Ben Noordhuis <notifications@github.com> wrote:

> In lib/punycode.js:
> 
> > @@ -516,7 +516,7 @@
> >  			return punycode;
> >  		});
> >  	} else if (freeExports && freeModule) {
> > -		if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
> > +		if (module.exports == freeExports) { // in io.js or RingoJS v0.8.0+
> 
> Because it's easier this way. The build step that bakes the files in lib/ into the binary isn't ready to pull in files from elsewhere. Because punycode.js is the only externally developed JS library, it's easier to have it live in the lib/ directory.
> 
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