Adds a simple favicon.

Going with an abstract sun design instead of a predictable clock-type icon for now. I'd rather keep the sense of drudgery to a min
imum. Icon should be public domain. Courtesy of:

http://openclipart.org/detail/172455/sun-abstract-design-by-bobby520-172455
        and
http://www.freefavicon.com/freefavicons/objects/iconinfo/sun-abstract-design-152-172455.html