Fix cnxml upgrade

- Include cnxml7 resource files in setup.py package_data
- Fix namespace problem when trying to upgrade cnxml
- Insert the updated cnxml into the database
- Add --filename for cnx-upgrade to_html

Errors like: `m11216,1.3,8583,0.5,False,"Entity 'uuml' not defined, line 90, column 21"` is not fixed yet in this pull request.