Import parse_qs from cgi instead from urlparse for old python versions.

openslides/participant/views.py

@@ -12,7 +12,10 @@
 
 import csv
 from urllib import urlencode
+try:
     from urlparse import parse_qs
+except ImportError: # old python version, grab it from cgi
+    from cgi import parse_qs
 
 from django.http import HttpResponse
 from django.shortcuts import redirect