Changed bbox in vectiles query_columns() to whole-world 900913
Changed bbox in vectiles query_columns() to whole-world 900913

Blechhirn/TileStache,Blechhirn/TileStache,MetGIS/TileStache,Kosta-Github/TileStache,mapzen/TileStache,TileStache/TileStache,SEL-Columbia/TileStache,mapzen/TileStache,moskvax/TileStache,moskvax/TileStache,MetGIS/TileStache,TileStache/TileStache,Billups/TileStache,Kosta-Github/TileStache,SEL-Columbia/TileStache,jbants/TileStache,TileStache/TileStache,Billups/TileStache,mapzen/TileStache,moskvax/TileStache,jbants/TileStache,Billups/TileStache,SEL-Columbia/TileStache,MetGIS/TileStache,Kosta-Github/TileStache,jbants/TileStache,Blechhirn/TileStache