Suggestion: New D front page

[bearophile]

Christopher Bergqvist:

> http://digitalpoetry.se/D%20website/D%20overview%20design.png

It's nice and better than the current design. Some suggestions:
- "Start downlading....." Shorten this with "Download ..."
- Edit button on the top right: remove it, and use an edit window, so you are already in edit mode. I'd like https://mozillalabs.com/skywriter/ editing subwindow here.
- "Get Started" and "D Zen" swap them on the page.

See you,
bearophile