Simplify header CSS
Change page navigation

- Move navigation to top of page
    - Page navigation has more space and fits on screen in more cases
- Move logo on bottom to replace text name on top
    - This avoids overlay of logo and sponsor
- Changed used colors to match our logo
Move contest link to normal navigation
Simplify download links

Provide links to zip files - most people anyway download it and it
simplifies the page.
Move green boxes to top of page

They are now more integrated to the page.
Nicer layout of buttons

Add some extra width
Shorten button texts
Move boxes to news page top
Smaller margin around content
Cleanup not needed html
Make whole buttons clickable
Make buttons color match rest of the page
Kill tabs
Smaller spacing between boxes
Improve sponsors formatting

Use <div>s instead of <br> to format the content
Include all silver sponsors on main page
Fix sponsors title
First draft of new sponsorship rules
Call home page home
Shorter label for sponsors