set VRT_SHARED_SOURCE=0 by default for thread friendly VRT usage with GDAL 2.0 - refs #437
set VRT_SHARED_SOURCE=0 by default for thread friendly VRT usage with GDAL 2.0 - refs #437

MaxSem/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,Uli1/node-mapnik,stefanklug/node-mapnik,tomhughes/node-mapnik,langateam/node-mapnik,langateam/node-mapnik,langateam/node-mapnik,Uli1/node-mapnik,mapnik/node-mapnik,Uli1/node-mapnik,Uli1/node-mapnik,MaxSem/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,MaxSem/node-mapnik,langateam/node-mapnik,stefanklug/node-mapnik,MaxSem/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,stefanklug/node-mapnik,mapnik/node-mapnik,stefanklug/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,langateam/node-mapnik,tomhughes/node-mapnik