Added source for the Attendee Incident Handling Procedure.
Added source for the Attendee Incident Handling Procedure.

pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2016,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,pyvec/cz.pycon.org-2016,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,pyvec/cz.pycon.org-2016