Improve the schema command with filtering option. meta data and workflow data are hidden by default. show-meta and show-workflow option are added to display them. Another "hide-type" option allow to hide additional entities type.

debian/tmp/usr/bin/cubicweb-ctl usr/bin/
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/cwctl.py usr/lib/PY_VERSION/site-packages/cubicweb
debian/cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl