navl schema: add department_number field to datasets
navl schema: add license_title_fra and license_url_fra fields
trim package: fix for new calculated fields
test: navl generated fields
fix trim_package with working licenses_group_url
Merge pull request #170 from wardi/master

navl schema: generate more dataset fields: department_number, license_title_fra, license_url_fra, add tests and fix trim_package