include limits header, which is needed after new refactoring in mapnik 2.2-pre
Merge branch 'master' of git://github.com/mapnik/node-mapnik
Merge branch 'master' of git://github.com/mapnik/node-mapnik
Merge branch 'master' of git://github.com/mapnik/node-mapnik
Merge branch 'master' of git://github.com/mapnik/node-mapnik
re-add unicode directory from ubuntu since mac or git or somebody is up to no good