[atlas] More maps available

Dear Atlas Users, Today we've enabled the "DNS root anycast instance map" that was announced at the RIPE meeting and in the RIPE Labs article here: https://labs.ripe.net/Members/kistel/new-ripe-atlas-features-in-the-making Clicking on the "Maps" link in the menu bar (top right) leads you to a page that lists all maps we have available at the moment, including the anycast map. As a small enhancement we also begun to link AS and prefix information to RIPEstat, to facilitate looking up more information about these resources. This is visible on the "my probes" page as well as on various maps (when clicking on individual probes). Regards, Robert (for the whole team)