Making footer prettier and responsive
@patdavid I added some contents to the footer: other GIMP websites + whatever links are set in .Site.Menus.footer
(currently FAQ and About).
Unfortunately I don't find my stuff pretty. First even the desktop view is not very pretty IMO (website links to the left, copyright in center and footer links to the right), what do you think? Should we actually add the "footer" links to the header but maybe slightly differently than the main links to make them less prominent? Something else?
And in responsive mode, it's even worse. Completely ugly layout because of my change. Would you mind having a look and fixing this?
See commit 2a741de4.