Allowing the customization of the number of workers
Page's "type" defaulting to an empty string instead of "text/html"
Checking headers of a URL before downloading all content
No longer setting HTML of page if any of the following is true:
 - page.type is not "text/*"
 - an error occurs
 - page.type is "text/*" but extension is a common media extension
Following redirects on header check
Added User-Agen to header check
Added empty "host" header for sites that require it
Updated debugger
Created a global variable for user agent
Silencing winston in renderSpec.js
Removed certificate stuff that's not being used
Added support for cookies and non-strict SSL with header check