add pycon.cz as allowed site
add pycon.cz as allowed site

benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017