Add WebKit reporter

[simov]

The initial idea was to create a more convinient reporter for node-webkit, you can read about it here

What I wanted was a nicely formatted spec reporter inside the devtools console. Example here (open up your console). Currently it's tested only in Chrome, but I guess it should work in Safari too. Firefox is scheduled the support for the extended console log api for version 31

In node-webkit I'm using mocha programatically, and I'm showing the devtools on startup, example here

[travisjeffery]

looks good, but this doesn't need to be in core. please publish this as a module and send a link that i can add to the wiki: https://github.com/visionmedia/mocha/wiki#interfaces--reporters

[simov]

I kind of understand the core thing, and I don't see how nyan is part of the package, but not this. I don't see any other reporter logging to the browser's console, which is something expected to have.

I'll think about a better name and publish this reporter as a separate module. Once it's ready I'll give you the link, or add it to the wiki. You can still merge this PR later on if you change your mind.

[tj]

Nyan is awesome!

[simov]

true http://www.nyan.cat/jazz

[simov]

Loot fixed
In case anyone is interested how to use it in node and in the browser