[Twisted-Python] Proposed new homepage

[Itamar Turner-Trauring]

On Mon, 2011-10-10 at 09:47 -0400, Glyph wrote:

> Unless someone has a serious objection, I think we should replace the front page later today.  (Itamar, do you want to do the honors, or shall I?)

I'll try to do it this evening, after adding syntax highlighting (half
manually, ugh) and fixing the comments mentioned here (scalability,
Quick Links).