also install cairo pdf and svg headers
go out of release mode
Merge branch 'master' of https://github.com/mapnik/mapnik-packaging
Merge branch 'master' of https://github.com/mapnik/mapnik-packaging
Merge branch 'master' of https://github.com/mapnik/mapnik-packaging
Merge branch 'master' of https://github.com/mapnik/mapnik-packaging
start targeting 2.3.x
Merge branch 'master' of https://github.com/mapnik/mapnik-packaging