[pyramid] Drop warning about pyramid_debugtoolbar not found in debug mode
Some people way want to run a pyramid server in debug mode without the
toolbar. This warning is annoying for them. Others should just install and
*include* the toolbar by hand.
[pkg] Add development.ini.tmpl to "cubicweb.pyramid" package data
Otherwise the file is not installed and `cubicweb-ctl create -c pyramid` does
not work.