Improved download button style (padding, font size)
Slight shadow and depression on active state for btns
Added download button "icon" (unicode)
Removed release date parenthesis on download button
Corrected line spacing on current download page header
Download button makeover

After the font change there were some oddities, but it did need a little bit
of work regardless to make it more appealing to click on.
Homepage style change to draw attention

I don't think this will have much trouble doing so. It's a nice change,
right before the first GNU release; the release announcement will be hitting
a lot of people, so let's be inviting.