fixing build error due to deprecated options in pip
fixing build error due to deprecated options in pip

TileStache/TileStache,MetGIS/TileStache,Billups/TileStache,jbants/TileStache,jbants/TileStache,MetGIS/TileStache,MetGIS/TileStache,Billups/TileStache,jbants/TileStache,TileStache/TileStache,TileStache/TileStache,Billups/TileStache