Fix the white pixels in the favicon's corners

When using Internet Explorer, one can see white pixels at the corners of
the favicon.  The diff does not change the binary size of the icon, but only
modifies the four corners to be transparent.

Cheers, Sebastian.

favicon.ico:
    Corners are now transparent.
inlining "here" links; added GitHub language filter
Merge branch 'fix-contact-page' of https://github.com/sebgod/www into fix-contact-page