fix name typo (ref #596)
fix name typo (ref #596)

mapnik/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,langateam/node-mapnik,langateam/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,langateam/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,mapnik/node-mapnik,tomhughes/node-mapnik