[pyramid] Add action verb used in some messages displayed by the command For instance we'll see 'instance started' instead of 'instance None', which is nicer.

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