[atlas] Small changes deployed on this Wednesday

Dear Atlas Users, On Wednesday we've deployed some changes to the UI. The most notable change is that from now on the download format of your probe's measurement data is JSON. The actual syntax is pretty much self-explanatory. The DNS anycast map now visualises server versions and SOA serials too. We made further changes to the way we show static network configuration of a probe on the "probe status" page. We also did some preparations to include Atlas in RIPE NCC Access, the RIPE NCC Single Sign On system. Regards, Robert, for the RIPE Atlas team