Prefixed some Postgres functions in VecTile with "ST_"
Prefixed some Postgres functions in VecTile with "ST_"

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