Create archiv-fur-die-civilistische-praxis.csl

Some issues in the style guide for this journal are not implemented automatic but have to be handled manually, e.g. "Festschriften" should not mention editors (i.e. delete them manually), <strike>pages for journal article should maybe more fuzzy like "328 ff"</strike> or what a "Archivzeitschrift" is where volume is shown.