[test] Add a "version" to cubicweb_mycube/__pkginfo__.py
Starting from Python 3.5, unittest_cwctl.py::CubicWebCtlTC.test_list()
would fail without this.
missing-dep-for-interpreter make => make | build-essential | dpkg-dev (usr/*/cubicweb/skeleton/debian/rules)
embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js