Swallow **kwargs for easier subclassing
Swallow **kwargs for easier subclassing

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