add Rüdiger to AUTHORS
add Rüdiger to AUTHORS

rklaehn/spire,siddhartha-gadgil/spire,codeaudit/spire,JackSullivan/spire,non/spire,tixxit/spire,adampingel/spire,AlecZorab/spire,siddhartha-gadgil/spire,guersam/spire,non/spire,kevinmeredith/spire,rklaehn/spire,JackSullivan/spire,kevinmeredith/spire,codeaudit/spire,tixxit/spire,woparry/spire,adampingel/spire,guersam/spire,woparry/spire,AlecZorab/spire