Add pre-install change to changlog mapbox/node-pre-gyp#260
Add pre-install change to changlog mapbox/node-pre-gyp#260

tomhughes/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,mapnik/node-mapnik,mapnik/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik