Add Werkzeug dependency
Add Werkzeug dependency

setup.py is missing dependency.
MetGIS/TileStache,SEL-Columbia/TileStache,jbants/TileStache,Billups/TileStache,jbants/TileStache,Kosta-Github/TileStache,moskvax/TileStache,TileStache/TileStache,mapzen/TileStache,Kosta-Github/TileStache,TileStache/TileStache,SEL-Columbia/TileStache,Blechhirn/TileStache,moskvax/TileStache,MetGIS/TileStache,mapzen/TileStache,mapzen/TileStache,Blechhirn/TileStache,Blechhirn/TileStache,moskvax/TileStache,Kosta-Github/TileStache,Billups/TileStache,MetGIS/TileStache,jbants/TileStache,TileStache/TileStache,Billups/TileStache,SEL-Columbia/TileStache