mobile: preparation for layout switching
first attempt for a mobile layout
mobile: flatten games played tables with CSS
mobile: Turn off telephone number detection on iOS
mobile: reduce font size of footer
mobile: slight improvement of navigation menu

This is just a temporary solution that is only slightly better than the
unstyled list. This needs to be redone with a good responsive navigation
solution.
mobile: add 'touch icon' for mobile devices
mobile: add navigation menu
Merge branch 'mobile'
Move server list into a migration