reserve std::vector capacity prior oppending + remove const qualifier
reserve std::vector capacity prior oppending + remove const qualifier

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