default to using the future, if present
default to using the future, if present

Blechhirn/TileStache,Kosta-Github/TileStache,mapzen/TileStache,mapzen/TileStache,SEL-Columbia/TileStache,moskvax/TileStache,jbants/TileStache,mapzen/TileStache,MetGIS/TileStache,Billups/TileStache,jbants/TileStache,TileStache/TileStache,robpvn/Vector-Tile-Research,SEL-Columbia/TileStache,MetGIS/TileStache,MetGIS/TileStache,SEL-Columbia/TileStache,mojodna/TileStache,mpuig/TileStache,moskvax/TileStache,Blechhirn/TileStache,jbants/TileStache,mojodna/TileStache,Billups/TileStache,robpvn/Vector-Tile-Research,TileStache/TileStache,TileStache/TileStache,mpuig/TileStache,robpvn/Vector-Tile-Research,Billups/TileStache,Blechhirn/TileStache,Kosta-Github/TileStache,Kosta-Github/TileStache,moskvax/TileStache