Update CSSDA badge to the Special Kudos Award
Update CSSDA badge to the Special Kudos Award

Why:

* https://subvisual.slack.com/archives/C2E6FDGNP/p1510220617000095

subvisual/2017.mirrorconf.com,subvisual/2017.mirrorconf.com,subvisual/2017.mirrorconf.com,subvisual/2017.mirrorconf.com