Update iso690-author-date-cs.csl

deleted komma in citation between autoher and year; added komma between year and locator.
Template: https://sites.google.com/site/novaiso690/metody-citovani
https://sites.google.com/site/novaiso690/metody-citovani/harvardsky-system-pravidla
Merge pull request #396 from libora/patch-8

Update iso690-author-date-cs.csl