Nim website front page redesign (unofficial and WIP)

[mikebelanger]

Awesome! I like the more direct, straightforward design. Plus that's a clever 
use of Pragmas. One minor idea is replacing the "FORUM" link with a more 
general "Community" link. Perhaps linking to here: 
[https://nim-lang.org/community.html](https://nim-lang.org/community.html).