Main page redesign
The main page needs to be redesigned (hopefully) before the RC3 release. The left-side menu could be tweaked too while we're at it.
- Remove the blue box
- Replace the header image with a bigger one
- Simplify description
- Remove Announcements for plugins/patches link
- Remove it; replace with features (which would include the supported compilers).
- Remove Random page link
- Add links to basic documentation like features and installing