Add JSCS config file

But not running it as part of `npm test` yet.

See discussion here:
http://markmail.org/thread/rzzvn2ax3tqzabfw

JSHint people want to focus on syntax linting and are dropping style oriented
options. They recommends using JSCS (in addition to JSHint) for style:
https://github.com/jshint/jshint/issues/1339

JSCS has recently added the options dropped from JSHint.
https://github.com/mdevils/node-jscs/issues/102

This commit contains a JSCS config file with some basic settings that generate
very few errors with the existing cordova-cli and lib code.

My goal is to eventually run JSCS together with JSHint as part of `npm test`.
The nice thing about JSCS is that style flame wars can be way more structured
with it as we can argue about very specific well named JSCS config options :)

I'm using it with SublimeLinter-jscs
https://sublime.wbond.net/packages/SublimeLinter-jscs