DOC: Updated index.rst: distribute -> setuptools
DOC: Updated index.rst: distribute -> setuptools

http://pythonhosted.org/setuptools/merge.html
nelsnelson/stevedore,JioCloud/stevedore,citrix-openstack-build/stevedore,citrix-openstack-build/stevedore,varunarya10/stevedore,nelsnelson/stevedore,varunarya10/stevedore,JioCloud/stevedore,openstack/stevedore,mandeepdhami/stevedore,mandeepdhami/stevedore