[pkg] Drop custom install_lib command and use include_package_data instead
The custom install_lib command appeared to be meant to install package
data, as declared in __pkginfo__.py. Let's rely on setuptools'
include_package_data[1] option to handle this.
[1]: http://setuptools.readthedocs.io/en/latest/setuptools.html#including-data-files
[bdist_wheel]
universal = 1
[check-manifest]
ignore =
debian
debian/*
cubicweb.spec
__pkginfo__.py