[dataimport] fix ucsvreader for python3 The csv module in python3 wants str, so use a StreamReader to feed csv.reader and don't decode the output

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
http://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))