Create vtei-author-date.csl

This is style for Czech journal VTEI for citation format "author-date". The second format for this journal (Numeric) will be prepared after validating parent tamplate (iso690-numeric-brackets-cs.csl)
Rename vtei-author-date.csl to vodohospodarske-technicko-ekonomicke-informace.csl

renamed to full name
Update vodohospodarske-technicko-ekonomicke-informace.csl
Update vodohospodarske-technicko-ekonomicke-informace.csl
Update vodohospodarske-technicko-ekonomicke-informace.csl
Merge pull request #474 from libora/patch-12

Create vtei-author-date.csl