Moving forward with styling

[Andrei Alexandrescu via Digitalmars-d]

I want us to get 
https://github.com/D-Programming-Language/dlang.org/pull/780 to a good 
state so it can be pulled and accept further improvements. I have 
difficulty integrating some of the drive-by advice here, so framing it 
as pull requests would make everyone's life simpler.

In spirit with the flatness of the new menu, I also removed the 
background image which was growing long in the tooth, leading to 
http://erdani.com/d/.

I've also added new menus for the libraries, both release 
http://erdani.com/d/phobos/index.html and prerelease 
http://erdani.com/d/phobos-prerelease/index.html

Is this ready to go and be subject to further improvements?


Thanks,

Andrei