Added stats and fullCss result

* mqh only returned separates mqs and code stripped from mqs
* now it returns 'grouped mqs' concatenated to 'stripped code' too
* added some stats to give an idea of the mqs 'fragmentation'*
Added minify options in the website

* added xem-minifier
* now it's possible to minify the result after getting grouped mqs
* updated the app to the changes in mqhelper module