update CHANGELOG with links to issues, commits, users
update CHANGELOG with links to issues, commits, users

[skip ci]

lightmare/mapnik,mapnik/mapnik,naturalatlas/mapnik,mapnik/mapnik,naturalatlas/mapnik,naturalatlas/mapnik,lightmare/mapnik,tomhughes/mapnik,lightmare/mapnik,naturalatlas/mapnik,lightmare/mapnik,tomhughes/mapnik,tomhughes/mapnik,tomhughes/mapnik,mapnik/mapnik,mapnik/mapnik