Adds a function to scrap downloaded HTML

This function looks for the link tags in the head of the HTML using cheerio, also it validates that it is a stylesheet link
Removes web-view.coffee file

The code of this file is fully implemented in the main.js file
Adds channel parameter to requestContent function

It makes generator function more dynamic and follows the DRY principle
Merge pull request #4 from adrrian17/styles-scraping

Styles scraping FTW!