Hompage buttons

*Added Font Icons, See http://zurb.com/playground/foundation-icon-fonts-3 for usage. You
can use it anywhere on the site.
For example this will display an adress book icon replace 'address-book' with any name from that website.
```css
<i class="step fi-address-book size-12"></i>
```
*Fixed Homepage Button not being responsive.
*Changed CSS rule to prevent conflicts.