Update README.rdoc
Update README.rdoc

Add forward slashes to exclude patters for proper configuration
substancelab/route_downcaser,substancelab/route_downcaser,marleyspoon/route_downcaser,marleyspoon/route_downcaser,carstengehling/route_downcaser,substancelab/route_downcaser,marleyspoon/route_downcaser,carstengehling/route_downcaser,carstengehling/route_downcaser