refactored html and css on main pages.  Added normalize.css

* Added normalize.css (google "css reset" for an explanation of why this is helpful)
* Consolidated style sheets (ideally, you'll have all of your styles in one sheet.  It makes it easier to see how they relate)
* replaced 'p .header' with 'h1'
* removed <br> replaced with adding a width to the div elements (it's better to avoid <br> and format your design using css instead)
* Removed all-caps text in place of text-transform: uppercase; (it's better to format your design using css instead)
* Removed as many classes as I could without changing the design. (makes it easier to read the html)