Removed check for self.write_cache but introduced an intentional Exception
Removed check for self.write_cache but introduced an intentional Exception

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