Added initial rudimentary home page.
Improved homepage by re-using the cc65.org design.

Copying those design elements was explicitly approved by the original author:
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Date: Mon, 8 Apr 2013 20:31:13 +0200
From: Ullrich von Bassewitz <uz@musoftware.de>
To: cc65@musoftware.de
Subject: Re: [cc65] Copy Web Page Design ?

Hi!

On Mon, Apr 08, 2013 at 12:27:23PM +0200, Oliver Schmidt wrote:
> I'd like to copy the following files
[...]

That's ok, just go ahead. [...]
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Reflect removal of builtin macro packages.
Reflect removal of builtin configurations.
Removed assumptions on search paths.
Documented the changed order of sources of search paths.
Added Travis CI link.
Removed useless command-line option.
Keep GitHub from delivering the credits as binary file.
Adjusted doc to the changed static driver names.
No 'Bugs/Feedback' pages here.
No 'Bugs/Feedback' pages here.
Described additions to the generic macro package.
Merge pull request #9 from greg-king5/gh-generic

Described additions to the generic macro package.
Added Travis CI status image.
Use status image as link.
Moved status image to the end of the list.
Added links to Windows binaries.
Have the menu clear the logo float.
Added menu.